Voice Control's equivalent on my old LG with Verizon was awesome, especially considering how awful the touch screen was and how much easier it was to just say "Call ______" rather than hope to touch the right buttons on the touch screen.
With that said, the Voice Control feature on the iPhone is awful, really. I said "Play Daisy" (an album by a band called Brand New) and it said "Playing songs by Easy-E" and Boyz in Da Hood started playing.
I then said "Play Brand New" and it said "Play songs on Never Blue" and Third Eye Blind's Never Let You Go came on.
No, I'm not trying to name drop bands. I actually thought the Easy-E thing was funny, to be honest. I'm just not impressed with the feature, especially considering the time it takes for me to hold the button and speak and let it respond, I could have pushed the button, slid to unlock, and found the artist I wanted nearly as quick.