Playing roam singed is a very big risk if you are not used to it. but if playing correctly it is one of the best, if not the best playstyle for the current meta. Not many people are used to it and its been done in history like the challanger roaming singed. You'll start falling in love with ghost flash once you start using it and you'll get used to it very quick. The whole idea of roam singed is being off meta and surprising enemies, being the only way to properly use your inspiration runes to fix your issues, helping lanes as a second jungler.

Pros:

1) Fixes the lane bully issue by a little bit.
2) You are a second jungler with ALOT of mobility.
3) Singed has an insane kit for roaming, use his flash fling goo combo well and have insane ganks.

Cons:

1) You will have Low CS almost every game, but dont worry, your runes and singed's kit in general helps with him getting back into the game.
2) You'll sometimes roam with no prevail, but that's apart of this playstyle so don't worry.
3) If your enemy is someone with ALOT of mobility they will also counter roam but this is very rare.