I too had issues, but have resolved them. For all the gorey details, see my posts on this thread (also under the name SoCal2006TL):
http://tl.acurazine.com/forums/showt...php?p=11089821
In a nutshell (somewhat...):
1) Had problems pairing. Although old phone had been deleted from HF Link on car, when it came to naming the new phone (after car successfully found the phone and vice versa), the HF Link complained about the name and simply dropped the HF Link. RESOLUTION: Sounds silly but make sure there are no phones on the car, then take the key out and start all over. Successfully paired on first attempt after doing this.
2) Incoming calls would lose the audio (HF Link would appear to drop the call and radio would come back on), call would still be on phone, but I could not hear caller. I had no problems making calls. RESOLUTION: Re-pair the phone.
3) Caller volume was very low. RESOLUTION: Wait until you are connected to someone using HF Link. Then increase the volume on the PHONE. The display will specifically indicate "Bluetooth Volume". You can only change this volume after your call is connected.
Hope this helps!