I only have Soundwave and Bumblebee atm and I must say that:

+ Soundwave: Not terrible, but not overwhelmingly impressive either.
+ Bumblebee: Very disappointed. Especially considering how awesomesauce the original mould is.

I really hope the other toys will be better, but just going off the Preview figures I voted on "Meh – I’m really NOT digging what I’ve seen so far"