These look worlds better than Dungeon Tiles.
Nonetheless, I've found that preprinted map bits don't do it for me- they are simply too restrictive. GX.Sigma mentions the 10' corridor as one example; I'd add "anything with an unusual shape" to the list. For instance, how would you do a circular room? What about irregular caves with winding passages? 45 degree angle intersections? Etc. I've given up on prebuilt walls and terrain pieces for this reason (I have a bunch of old wall pieces from some cool company or other, but they're all straight).
For me, unless premade terrain features can give me exactly what I have on my own map, I've found myself completely dissatisfied. So, while these are cool- and honestly, for the tiles crowd, they are probably a win- I personally wouldn't be interested.
Don't take that as discouragement, though; like I said, if I was a tile guy, I'd jump on them as a "better than what I have seen out there right now" option.