This is a fairly modest little market located close to Prague's old town square (roughly a 3-5 min…read morewalk just a couple of blocks away). I actually just happened to stumble upon this place after wandering around the area.
The market is full of trinkets and items that's very tourist-centric. Many of the proprietors sell cheap shit like magnets, cups, post cards etc. Some of the shops carry produce or simple fruits and vegetables. A few others feature local artisans who sell handmade jewelry and paintings. Even though generally this place feels touristy, some of the stuff did feel very local and cool. I ended up buying a few small paintings because of the nice drawings of St. Charles bridge and other local attractions.
Personally I think this isn't a place that you make a point of visiting unless you had some extra free time and wanted to check out some reasonably priced items to take back home with you (if you're a tourist). However, if you do stop by, I wouldn't be surprised if you do happen upon this place that you'll still take a few minutes to check out what they have. Some merchants here are more pushy than others but generally they are all ok. Some of them are also flexible about bargaining.