I just wanted to say that I recently purchased the Parrot Minikit Chic (which is the girly version of the Minikit Slim - same device, just with a pretty modern flower design on the speaker) and it works really well.
It has voice dialing built in without you having to train the device to your voice (though if it has a hard time recognizing what you are saying for some contacts, you can set up a voice tag for it) and you can use several ways of saying it, including a real sentence like, "Call Bob Jones at home" (well, that is, if you really know a Bob Jones...).
You can hear calls clearly and well and they can hear you clearly and well - a person I called thought I was talking with the phone up to my head and was impressed it was a hands-free car kit.
The phone book (up to 2,000 contacts per phone) automatically syncs to the Minikit from the Pre upon pairing each time they pair up and you can also manually sync the contacts after pairing.
If you need to enter numbers during a call (i.e. to leave a voicemail for a certain box or if you're listening to your own voicemail calls), you push the center button and choose the number you want with the turning wheel that surrounds the button (like a mini version of the i-Drive in BMWs) - you can spin it fast to make it skip through numbers without announcing them (same for your contacts list/alphabet for contacts list if you choose contacts manually instead of by voice) for quicker access.
The "lady inside" it has a British accent, but it is pretty pleasing when she's not saying names all wrong ("Uh, WHO did she just say?!").
I really like it and recommend it!