Hey, I'm a member of the Kled Only club and I see the potential of Kled.

Pros
Easy to duel people
Really nice escapes
Easy to chase with
2 Health bars

Cons
Hard to master
Low carry potential
Almost useless without Skaarl

Passive - Skaarl the Cowardly Lizard

Kled is accompanied by his semi-trusty mount, Skaarl. Depending of whether Kled is Skaarl the Cowardly Lizard.png mounted or Skaarl the Cowardly Lizard 2.png dismounted from Skaarl, his set of abilities is altered.
Skaarl the Cowardly Lizard
MOUNTED – INNATE: Kled's health cannot be improved except through growth, instead Skaarl has 400 - 1505 (based on level) (+ 100% bonus health) maximum health and, while together, all damage dealt to the duo is suffered by Skaarl. Upon being reduced to 0 maximum health, Skaarl flees and Kled becomes Skaarl the Cowardly Lizard 2.png dismounted. While Kled dismounts Skaarl, Kled becomes briefly untargetable and any damage in excess of Skaarl's current health is ignored.
Skaarl the Cowardly Lizard 2
DISMOUNTED – INNATE: Kled gains「 125 bonus attack range 」and 105 - 190 (based on level) bonus movement speed while moving towards enemy champions, but his base movement speed is reduced「 by 60 」and his basic attacks deal 80% AD. Additionally, Kled gains the ability to restore Skaarl's Skaarl the Cowardly Lizard 3.png Courage to Skaarl the Cowardly Lizard.png reunite again, which is displayed in Kled's resource bar.
Skaarl the Cowardly Lizard 3
COURAGE - INNATE: Kled restores 4 / 20 Courage on takedowns, and 5 / 15 Courage for dealing damage. At 100 Courage, Skaarl returns to the fight with 50 / 60 / 70 / 80% of his health. Recall.png Returning to the base fully restores Skaarl's Courage and health. If reuniting outside of base Skaarl gains Frayed Nerves, and a Skaarl the Cowardly Lizard 2.png dismounted Kled will not be able to restore Skaarl's Courage for a brief period of time.


Q - Beartrap on a rope/Pocket pistol

Cooldown: 9 / 8.5 / 8 / 7.5 / 7
Beartrap on a Rope (mounted): Kled hurls a beartrap tied to a piece of rope forward in a line, dealing 25 / 50 / 75 / 100 / 125 (+0.6 per bonus attack damage) damage to all enemies it passes through and attaching itself to the first enemy champion or large monster hit. Minions take 50% increased damage.

If Kled remains within a slowly decreasing radius of his target for 1.75 seconds, he pulls them towards him, slowing them by 40 / 45 / 50 / 55 / 60% for 1.5 seconds and dealing 50 / 100 / 150 / 200 / 250 (+1.2 per bonus attack damage) bonus damage.

Pocket Pistol (dismounted): Kled sprays a hail of five pellets in a cone, dealing 30 / 45 / 60 / 75 / 90 (+0.8 per bonus attack damage) damage to all enemies that intercept the pellets, and dashing in the opposite direction. Enemies hit take only 20% bonus damage per pellet beyond the first.

Each pellet that hits an enemy champion restores 5 Courage.

Kled periodically stores ammo, up to a maximum of 2 stored at once. Kled will store ammo even while mounted.


W - Violent Tendencies
COOLDOWN: 14 / 12.5 / 11 / 9.5 / 8
PASSIVE: Kled periodically enters a frenzy that grants him 150% bonus attack speed on his next 4 attacks for 4 seconds, with the final attack dealing bonus physical damage, capped at 200 against monsters.
BONUS PHYSICAL DAMAGE: 20 / 30 / 40 / 50 / 60 (+ 4 / 5 / 6 / 7 / 8% (+ 5% per 100 bonus AD) of target's maximum health)


E - Joust
COOLDOWN: 14 / 13 / 12 / 11 / 10
MOUNTED – ACTIVE: Kled and Skaarl dash a fixed distance in the target direction, dealing physical damage to all enemies in their path and gaining 50% bonus movement speed for 1 second.

[PHYSICAL DAMAGE: 20 / 45 / 70 / 95 / 120 (+ 60% bonus AD)]
Kled and Skaarl mark the last enemy champion or large monster they hit, gaining the ability to reactivate Jousting to dash a fixed distance through the marked target, dealing physical damage to all enemies hit.


R - CHAAAAAAARGE!
RANGE: 5000 / ? COOLDOWN: 160 / 140 / 120

MOUNTED – ACTIVE: Kled and Skaarl charge toward the target location, automatically navigating around terrain along the way.
While charging, the duo gain bonus movement speed and a shield, both increasing over the duration.
MAXIMUM SHIELD: 200 / 300 / 400 (+ 300% bonus AD)
The shield lasts for 2 seconds upon finishing the charge. The duo trails a directional draft on their wake for 10 seconds that grants the same movement speed to all allied champions who follow their lead.
Skaarl homes in on the first enemy champion encountered, Airborne icon knocking them back and dealing them physical damage based on the distance traveled.
PHYSICAL DAMAGE: 12 / 15 / 18% (+ 12% per 100 AD) of target's maximum health

You can actually use (Q) Beartrap On a Rope during Joust for a nice combo

Use (Q) Beartrap On a Rope to clear minion waves while harrasing

Try to use (R) CHAAAAAARGE! On fog of war ,or a bush to not let the enemy see where you're heading.

Do not level (W) Violent Tendencies immediately at level 2, wait till you land a (Q) Beartrap On a Rope and go in so you can get all 4 hits off (W) Violent Tendencies.

If you're not familiar with Kleds kit I would not recommend playing him in ranked as he is hard to control.

If you're just looking to have fun in normals, I would definitely play Kled his ultimate is way too fun to use.

If you're playing against a tanky top like Irelia, Maokai, Sion, I would recommend that you buy Black cleaver, the armor shred makes your (W) Violent Tendencies do a lot more damage and it's easy to get all 6 stacks on Black Cleaver.

If you're playing against a squishy top like Teemo, Riven, Fiora, You should get Triforce, because of the cdr you get to use (Q) Beartrap On a Rope to clear waves and (W) Violent Tendencies for dueling.

Phantom Dancer - This item seems like a bad choice, but in my opinion the attack speed helps you hop onto Skaarl a lot faster as well as proc the (W) Violent Tendencies quicker. The critical chance on the item helps you duel like a madman, if you get lucky enough to get crit on the 4th hit say bye bye to the enemy health bar. The passive helps you survive when you're not on Skaarl and it allows you to chase really easy when you're not on Skaarl.

During teamfights you want to use (R) CHAAAAAAARGE! to engage or get a pick off someone, you're whole team gets the speedboost and the enemy will not be able to run away.

In teamfights you need to try and single out someone, if you try to 5v5 they'll burst you when Skaarl runs away, but if you single someone and split them up from the fight you can easy duel, Remember Kled is a really strong duelist and with the addition of exhuast, it'll be really hard to win agaisnt Kled 1 on 1.