I just bought the wife the motorola T505
I gotta say I love this thing with the Iphone 4.
FM Transmitter works awesome, calls sound good, (mother in law told me I sounded very good on her end)
Bluetooth to FM Transmitter for Music was amazing, i have a cheap FM modulator I use now, but i get whine and static. Using the T505 was crystal clear. I cant say enough good things about it. But Again I only had it 2 days now...
Winky