I have been messing with some for the past few months in the fire service.
The only beef I have heard from the firefighters was the lack of belt clip. The entire radio can be slipped into a cradle, but does not have a dedicated belt clip like the XTS line. So when a call goes out, they have to pull the cradle and radio off their belt, remove the radio from the cradle and find a safe place to keep it while on the call.
But IMO, the benefits far outweigh the belt clip issue.