I'm using 5 and 5.1 just came out as well.
I like it alot, all the features of 2.91 and some from 3
but you can use skins from 2 as well as 3 and all the plug-ins of 2 and 3 work.
the media library is mucho updated , it actually works, has built in Net TV streams, and they work great. I think it's a really good product.
if you wanna try it out install it in a different directory and play with it , if you don't like it remove it.