It's a good game, and really comes alive when you connect it to Sonic & Knuckles, so if you're going to pick it up, I recommend you get Sonic & Knuckles too, as it's basically the 2nd part of Sonic 3.

As for me I don't play this game for the simple reason that it's the one Sonic game I'm missing from my Mega Drive collection, gonna have to pick me up a copy one of these days.

Hmmm, well do you already have the other games on the Sonic Mega Collection? What games are on that anyway? I mean, if you're only missing Sonic 3 and Sonic & Knuckles then it might not be worth playing out 30 odd quid just to get the pack on PS2 when you can get it cheaper on Mega Drive.