We (I) have the IHF1000 kit installed in my car and it's one of the best kits I have ever used. The voice recognition is tops! The call quality is great and I can confirm 7290/OS4 compatibility. I can also confirm we could NOT get our 7100t/OS4 to work with it properly.

We have them in stock for those 7290/7250 users who wan to take the plunge:

http://store.bizshopr.com/motihf1000.html