For real vinyl collectors, this is the place to go. They've got an excellent collection of most of the classic genre's (funk, soul, rock, etc.) but if you're looking for rarer stuff, I suggest hitting up Grandiose. Most of the records here are decently priced and the quality tends to be great too. The thing I love about this place is that it's a real, dirt-under-the-nail records store. Stepping in, you can tell that this place has a history as long as most of the LP's they sell. This place is a shrine to good taste in music and a sanctuary for those who know what's good.
As far as issues I have with the place, I think they have way too much John Denver era type recordings and not enough funk/soul/R&B. It's a question of personal taste and that's all. Besides that, this place is a total hole in the wall which is why I love it and why I think it continues to remain one of downtown Phoenix's best kept secrets.