Well.. keep in mind I haven't play Rebellion (yet but I'm working on it) so there may be some problems I'm not aware of.
I read several times the book and I really like what I see.
It solves several problems I have with LOTR : examples : pikes vs cavalry and utility of WS.
Enough army lists to play nearly everything you want and the scenarios seem nice.
No campaign système (but is that really necessary ? )
In fact, only thing I'd like to see right now is.. more models in the range