Romo has made a smooth transition to the booth. He has been very very good, and really has provided the ability for the viewer to better understand the thought process of the quarterback and what they are reading on the field in two minute type situations. His insight in this regard has been outstanding, and it's something that really hasn't been presented in such a cogent, engaging manner before.
If I was going to critique him at all, it's on the subject of replays/coaches challenges. He literally equivocates about every single call, and will very rarely take a stand on what he thinks about a play. This is a place where he needs to improve - he comes across as indecisive and wishy washy during those scenarios. Every play is "really close", and he won't give an opinion.