Excellent model- I love it, and if you have a relatively recent Photoshop it's dead easy to kitbash too. I've added side walls, text livery and other stuff to some of mine, and will be doing some circus wagons, but they are great as they are. The directions aren't comprehensive, but they don't need to be. It should be really straightforward to assemble.
One observation is that these are probably a little large if printed at 100% when compared with Dave's buildings, so if you need that level of accuracy then maybe print a few percent smaller. The size they are though is better for in game, if a number of 25/28mm models are to be positioned in and on them.
These were a kit I wasn't going to get, and the pictures don't do them justice, but I am so glad I did.
[4 of 5 Stars!]