I saw the first 2 votes, and those are not quite fair.
To make it a bit fair, let me tell you what exactly is wrong with your guide:

Thy sins
1. Nothing maxed at lvl 9
2. "He can be used as an ADC, AP mid, jungler or as a tank (but not very effectively)" If he cannot be used effectively as a tank, than in viability language, he cannot be used as a tank.
3. "No AOE abilities (Alpha strike not included)" Then he DOES have an aoe ability. Remove this con noah :O
4. "Passive is not the best (unless high AD & DPS)" But you ARE building him high AD + DPS :S
5. "Without meditate basing is regularly required" But you DO take meditate early on. So you will have this skill
6. "Personally I don't think this is a very useful spell, as highlander is a better alternative' The effects can stack.
7. "Smite is a must have for junglers. It's cooldown is tiny and it deals true damage, however if you aren't playing jungler you would be mad to take it." Then don't mention this spell.
8. "Personally I never take exhaust on to the battlefield. The effects of it don't last long and it only has 2 main uses; chasing and running away. Flash and Highlander both do these much more effectively." This is probably the best 1v1 summoner spells in game. AD Yi is a 1v1 champ. Conclusion: Exhaust is legit, it might be even a better pick than ignite.
9. Runes, masteries and tactics remain unexplained.

Thy blessing
1. Comment to vote is on
2. Though it is an AD yi build, and I do not fully agree with the skill order, the rest of the build seems "okay"
3. Well structured cheatsheet
4. "Okay" use of coding + structure

Result: Path of Redemption
You have stuff to do.

look above

Master Yi is awesome and this build is great but you should try and make it more eye catching you know make it look pretty people do judge the book by the cover (I'm sorry to say) so do some mor coding it could take a while but just give it more I don't know color because right now it look boring and everything look too big size it and make everything creative

I would like to thank all of you for commenting. To UnhallowedGerlaf, I would like to say for a start that because Master Yi has so many useful abilities I think it is a waste just focus 1 ability as they have different uses. In my opinion, Highlander is not useful in team fights because although it gives big cooldown when you get a kill or assist, in the time of most good team fights Alpha strike will have quite a short cooldown. Alpha strike is not really a real AoE ability because if a team fight is next to minions, then more likely than not, you will hit them, not the enemy champions. Summoner spells are really a matter of playing style and opinion, so though you may value exhaust, I have no place for it.

Next to ShortyHUN, my formatting is not very good, as this is my first guide. I do ought to add more information, which is why I put (under construction) in the title. The skilling order does make sense if you look at the previous in this comment. And seriously, Thornmail is not bad at all. It gives a useful 100 armour as well as a totally amazing unique passive.

Thanks for the comments guys,

Petermination

Very bad formatting and lacks overall information. Also lots of major game knowledge flaws, some already noted above my comment (like you can buy elixirs with full equipment). Right now it's definately a downvote, but I'm not just throwing random cr*p at you so what to improve:

• Formatting. Read jhoijhoi's making a guide and other stuff about BBCoding.
• Add more information on runes/masteries/items.
• A skilling order with sense...
• Alternatives.
• No useless items like Thornmail, you should know why...
• Match statistics, also makes clear if you are lvl 30.

I've seen strange reasons for downvoting guides but this is ridiculous.

As for the guide itself, I would like if you would be kind enough to explain why you choose the interesting skill sequence I would appreciate it, as I most often max first skill by Lv 9, next by 13 and last by 18. Also, Highlander is not useless in teamfights as it lets you reset your cooldowns and continually Alpha Strike people. I would not list " Alpha Strike offers a big chance to ks" as a pro. I would not list it at all because trying to ks is a waste of your time. If you are a carry and your team is halfway to competent you will be getting the kills. No AoE abilities in the cons section should be removed because Alpha Strike can hit most of the enemy team. Exhaust is useful for shutting down the enemy AD and basically wins you 1v1 duels. All in all it is a nice guide and your name is quite clever, you just need a bit more work, especially with coding as I have done. Good luck ^^

Not my type.

Nice guide! But I think it needs a bit of design.

Greetings from Argentina :)

You can buy elixirs with full inventory. Simple XD