Renekton is a big bad bully... Not caring much about being 1v2 or 1v3 for that matter....
But be aware that untill the point of where you get good at him you might just do bad and get a bit frustrated, so be patient if you buy him.. He has great sustain good stun, a nice ult and feels good, a great solo top, but any other role does not fit him...
If that sounds like something you like be sure to pick him up...