We've had our 29 CB for a couple of months now. I can only speak about the 29 CB. I haven't spent any real time on a 29 S.
We LOVE the command bridge. I can't really see how we would enjoy our boat nearly as much without it. We live in the Pacific Nortwest, so on beautiful sunny days, it is fantastic to drive the boat while fully outside.
I find docking and leaving the dock from the command bridge to be preferable if you have someone with you, since you have such a great view of the entire boat. But, not so much if you are docking alone. I think the cabin helm has incredible 360 visibility in both the CB and the sedan.
A funny little difference between the 2 helms is that the throttle on the command bridge sits at an angle while the cabin helm throttle sits flat. So, there's a small learning curve for getting comfortable with both helms.
The CB still has the atrium Windows for lots of light. But I am guessing the sedan has more.
Also, the command bridge sits back a bit to allow there to be the atrium Windows, so you lose possible storage space on the top where the command bridge sits. We are still figuring out how we will transport our kayaks when we take them on the boat. The sedan might give more options for that purpose.
All in all, we wouldn't give up the command bridge for anything.
Hope this helps.
Ken
Rainy Day