I have the i2, which seems to basically be the i5 minus color.

Other than being a little slow and sometimes hanging for a few seconds while "typing" in street names, it works quite well and the scroll wheel isn't bad at all. A keyboard would obviously be better, but for the price, I'm not complaining.

Edit: i2, not i3.

Also, I forgot to point out that the i5 is $342, the i3 is $309, and the i2 is $236.