Live Dealer
Positive:
1. You can see dealing the cards.
2. You in atmosphere of real casino
3. As for me I trust Leave Dealer more than software.
Negative:
1. Deals toooo slow...
2. Bad quality of video (in several casinos)
3. To play for a long time you need unlimited Internet connection....well, almost unlimited, but very cheap, cause it's eat a lot of traffic to transmit video from server to you.
It's my opinion.