The 2.3.x roms are very stable and complete.
I have tried some 4.x roms and after a few months I switched back to Mokee OS.
To be honest, I haven't found a 4.x rom that did what i expected.
They are not unstable, but most of them have small (or even bigger) stability issues.
They are missing a lot of features, for example FM-radio (nobody seems to care or to notice, but I do).
They are noticeably slower than 2.3.x especially when you re a power user.
I don't see any reason why I need 4.x on Skate. it's not that it is giving me more features/options than 2.3.x.
It might be nice to brag with, to prove a point, but there really isn't anything that I cannot do with GB that I could do with ICS.
I know that technically there are new libraries for ICS, I don't know any software that uses those.
If it is for the good looks, Mokee OS also looks great in my opinion, much better than most ICS releases.
It's not that i hate ICS or JB, i think that they have great background improvements comparing to GB.
I also appreciate the hard work of the developers in making this possible.
I just don't think that the skate is the best phone to run it.
If you want stability and features, GB is the way to go, you really won't miss anything.