I was a little nervous to buy this seeing the overwhelmingly positive reviews. You never know if they are all fake reviews, however, I took the chance. It was a gift for my boyfriend after all! He REALLY wants to play Pokemon again, but he lost his DS years ago and I wanted to surprise him with it. Even just opening it myself gave me a blast from the past!Regardless,I bought the DS specifically from "Console Replay." I don't know if that makes a difference in the quality, but I thought I'd include it just in case anyone is curious. The DS works well so far though! The sound is good, the screens are not scratched or broken, and the buttons seem to work (other than the direction pad, it is a tiny bit loose. Overall though it still works). The game slot sounds like it might have some grime in it, but I inserted a game card and the game still ran. Awesome! The exterior is pretty clean too and had the stylus inside. The stylus was working well and wasn't broken despite those things being the easiest part to break or lose. The best part though was that it came with its own charger. I really enjoyed not having to buy a separate cord for the device. Unfortunately, I don't have any gameboy cartriges so I wouldn't be able to test it out, but I'm sure it would work well too based off of everything else. Overall, it was a pretty good buy. I'm glad I did take that chance, although I hope nothing changes with the DS (quality wise) in the meantime.