Started playing this today. Completed enough of the first missions to open up the Vice Kings missions, which I’ve made a start on. Also took part in several side “activities”, such as Snatch, in order to get my respect bar up – you need to do that in order to open up more main missions.
So far it’s pretty good, although it isn’t as great as San Andreas. It doesn’t have bikes. Or helicopters (yet, at least), fire engines, or even many hills. It’s just too flat. But it’s not bad.