Well, I've read the reviews and mostly don't agree with them.
Yeah, it does take a bit to load the game. And yeah, when playing alone, the computer does take its sweet time in playing, some of which you can tap to speed up. I've never noticed if the computer rolls better in single play - guess I'm not competitive enough to care. I just like filling in the Yahtzee card and seeing how well I do. When I play in single mode, I'm just killing time, actually.
It works great in the double player game. There is still the slow load time, but once that's over, the game moves along as fast as you and your opponent make it. It's nice 'cause you don't have to do the math yourself and it'll highlight all the ways you can play your die (e.g. four 4s can go in Four of a Kind or the Fours - the game will highlight those areas.).
Don't know how much more I can tell you. I find it as good as or maybe better than the physical version. In the long run, it's just of bunch of dice in a cup, you know?
I know I don't regret the purchase and I've had many pleasurable sessions with it. Of course, YMMV.
Hope that helps.
Marilyn