I just bought the Fasicanate about a month ago, and love it. I had the Droid before that. The only problem I've had so far with the new Samsung is the GPS is hit, & miss. One day it works great, and the next day not so much. I've talked to tech support from Samsung, and there supposed to be releasing an update for it, but couldn't tell me when. It comes with Bing, which I didn't care for, so I had to download google for it, but everything was free, just took a little more time to customize it to my liking. I can say the picture with the Amoled lighting is amazing, and looks better than any other phone out there. It's a little bigger than the I-phone, but weighs quite a bit less.
Here's a link comparing the I-phone, and the Fascinate.
http://www.youtube.com/watch?v=e7i9LUKqw_o&feature=player_embedded
I've read when rooting the phones, if there not done right, they become a real expensive brick. Be careful if you do that, and make sure you do it right the 1st time. You might only get 1 chance.
Yes, it will hotspot using wi-fi, so it's alot faster than the I-phone also. You'll see that in the review.