I've bought every single one in the series since III including the vice city/liberty city stories ports. This is a definite buy for me.
Involnerable, I would edit the .ini file to make the tank the starting vehicle in GTA. I loved mowing people down and setting them on fire. It is no small wonder I grew up to be a candle maker. Oh wait.
The delay is cool. Being inside is something of a lesser sin in September. Nothing like being in the sandbox surrounded by 20 sociopaths with heavy weaponry.
I couldn't ever get into these for more than a week or so. I'd get bored with the story, so I'd just create mayhem until I got killed, which in turn got boring.