While Neutral Grounds started stocking D&D books again, they didn't get everything (no Complete Champion but there was Drow of the Underdark for example). One find at A Different Bookstore's Serendra branch was Dungeon Tiles, although someone should seriously talk to them about which items to get and not get. I mean aside from Dungeon Tiles, the only other D&D product they had was Dungeon Master's Guide II and while I appreciate the bookstore stocking D&D books, in my opinion they've been stocking the wrong D&D books. Just like the first and only time National Bookstore stocked D&D gaming books was the adventure Speaker in Dreams (no PHB, DMG, or MM).
Anyway, so I got to use them last weekend, although I didn't really use any elaborate terrain. Still, they were quite fun and sturdy, and complemented the miniatures well. It's easily one of those products that you want to buy a lot of (since you could always use more tiles), and surprisingly they still worked even without lines. Previously, I was using the D&D Miniatures maps and tiles and while they were good, didn't give me as much flexibility.