If these share some of the sound of the FS-1s, they should be very good. I own a pair of FS-1s (bought them for $30 when they had been discontinued!) - they are my favorite "walking around" earphones and have been since 2005 or 6 when I got them. For awhile, Future Sonic was only producing 'phones well out of my price range, but I've had my eye out for another fire sale when they discontinued a line! I suspect that the AtrioX MG5s are somewhat different in sound quality though. FS-1s aren't overly bassy. If you use the Future Sonic foam tips, the FS-1s are fairly accurate and balanced. Until I bought a pair of Klipsch x10s, I would use the FS-1s for listening to classical, electro-acoustic, and jazz with satisfactory results.
The AtrioX MG5s are currently $50 on Amazon and I'm thinking seriously about buying a pair. I'm looking for a pair to replace my FS-1s. While I love them, the cold weather isn't exactly conducive for squeezing foam tips in my ear in winter and they are a little uncomfortable during the humid summer months...
(This is my first post, btw. I love this forum! I wish I'd discovered it years ago!)