The Exchange is a pretty solid store with a good selection. They have a bunch of vinyl (both new and used) with very fair prices. I've taken home more than a few jazz and rock records.
The staff is extremely helpful and very nice. They seem like the kind of people you'd want to talk music and just hang out with. The customer is treated very well.
The store can get a bit crowded at times, but it is in a nice location. I will typically wander into The Exchange on my way to The Root. They are pretty much the perfect couple in my book.
I haven't been disappointed with a trip to The Exchange on Detroit yet!