Any of the Eastern European or Chinese mags are great, even ones with dents will work fine as long as the floor plate stays on and the follower moves past the dents. Great design and built like the proverbial brick outhouse.
US made AK mags are pretty much crap. Avoid ones made by National like the plague. Pro Mags will usually work if they don't fall out of your gun, but they are not worth the asking price, the used mags are a bargain at their asking price.
--wally.