It's always nice to see old games re-released on new platforms. Here we have all the old Sonic games from the Megadrive (and other older consoles) that can run on the PS2, bugs and all. The bugs mentioned are actually from the original game, and just got copied across. Nothing major, and nothing to stop anyone from playing it.
A great buy for most, but some younger people may not like the old school 16 bit sideways platformers anymore.