These maps were originally commissioned from a successful Kickstarter campaign and the two releases currently available (the Dwarven Crypt Dungeon and the Goblin's Den Dungeon) are on sale over at DTRPG.
On-deck for release but not available as of the time of this post are the Thieves' Hideout and Merchant's Cave.
OK, getting a bit ahead of myself there....personally I wasn't planning on using the generic stat-less dungeon encounters listed in the description PDF, but I will probably use the layout provided.
In addition to the descriptive PDF you get another PDF with the tiles themselves. The dungeon tiles are a little "cartoony", but not too much so in my opinion, and have a bit of a 3D perspective to them. They remind me of the Blue Boxer Rebellion's maps. The Dwarven Crypt Dungeon is much smaller than the Goblin's Den Dungeon and looks a little "cruder", more like it was an earlier attempt. It is a fine dungeon though and worth the couple bucks it sells for.
I realize that these map tiles are made for printing out and using physically, but what drew them to me was the potential for use with a Virtual Table Top (VTT). These tiles look great, but if you aren't sitting at the "bottom" of the assembled map set, some/all of the perspective will probably be lost on you. When I first saw these maps on the Kickstarter I realized that usually with a VTT all the players and the GM would get the benefit of the perspective (assuming the game is online for everyone).
I'll probably end up going through these and tweaking them for my own VTT use. I did notice that the rooms are not sequentially numbered, which was a nice touch. My players would notice if they went from room 10 into room 12. They'd spend a lot of time searching for what they'd assume was secret room #11. I actually didn't like the numbers on these tiles at all when I first starting looking at them, but it didn't take long to realize they are a necessity for larger sets like the Goblin's Den.
Overall I'm quite pleased with my Small Dungeon Maps purchases and can't wait to add the upcoming sets, hopefully the beginning of much more, to my collection.