This book is free, and like the other titles in the 101 series it gives you just what it promises: a list of names that can be used as inspirations or story hooks (or word game clues) for GMs as they need them.
Ordinarily, considering that the only thing I have to give up to read it is the time it takes to download it and then go to the trouble of reading the words, I'd give it a five right away. However, in this case, I felt it was a bit lackluster. Unlike (for example) their list of potions, a location is something that a GM is likely going to have to reorganize (at minimum) a night's worth of gaming to include. Similarly, while some of the names were quite interesting, others seemed a bit generic. "Pantry of the Grail" is, when you think about it, the same as saying "Kitchen of the Drinking Glass" or "Dining Room of the Cup." I'm not saying it's bad, but compared to my expectations for this franchise, it's a bit lacking.
Another complaint is that we don't go all the way through the alphabet with these titles. The last five letters of the alphabet are missing. As a bonus to the readers of this review, I will add: Vestibule of the Ancients, Window of the Watchers, Xerxes' Planetarium, the Yestertime Marketplace and the Zoo Of Ooze. Okay, maybe those letters are a bit tricky to come up with names for.
Also: as an unashamed lover of puzzles, mazes and the likes, it borders on the inexcusable that the entries under the letter M don't include any mazes. I give them bonus points for including a labyrinth, though.
In the end, you can't get over the fact that it's still completely free, and it still gives you exactly what it promises. If you need an imaginative name for a place, then it really couldn't hurt you to take a look at this. For all my complaints, it's still earning a 4 out of 5 in my book.