So I just got my 541's and was pretty excited... but I have now had some 'waning' of excitement.
So this looks like quite a capable unit, and has some good features for an smb ap, especially the clustering.
Unfortunately, a deal breaker for me is the fact that both radios can't be on at the same time. I think that this is a fairly big shortcoming. It means that if you do want to deploy an a and bg network then you have to double up on your ap's.
I understand that this is a designed for an smb solution, but for me, it would be good if we could say I want phones on a and all my data clients on bg, which would be appealing to me.