Anyone Using 4429's in a Recording/Mixing Studio? Impressions?

Hey All,
I'm hoping to get some feedback from those who are using 4429's solely in the recording studio environment.
Not much out there as far as feedback for this application. Actually, I haven't been able to find anything.
If anyone would/could chime in on their experiences...good or bad with sound translation from the control room to other listening environments, how they have the 4429's situated in the control room (near field/mid field/soffit mounted) and also power amp choice and configuration...I would greatly appreciate it.
How do they sound for tracking and mixing?
Happy? Unhappy?
Thanks,
Rin