Bluetooth...Is it useful?

I love the Bluetooth. I have a Bluetooth connection built into my new car so that I can answer the phone with a push of a button on the steering wheel, and the sound comes over the stereo speakers, no matter where the phone is- it could be in my purse in the trunk and it will pick up the signal. It's a great thing when you live in a state where it is illegal to talk on the phone while driving (In NY we get a $90 fine for the first offense). I also have a bluetooth earset which I use if I'm in a store for a while; it's good to have the hands-free, wireless option if you get an important call, although I try to be polite and not use my phone much in public places because I know it annoys a lot of people.