I bought the program about a month or so ago and also purchased the Brickyard recently. It's very easy to work with and create structures. I've created several on the computer, but have only printed one out and built it. I think I can build a basic, four wall structure now in a couple of hours. Of course, as the complexity of the structure goes up, I believe the time to build will as well.
The one structure I built, I printed it on photo paper and then glued it to foamboard (using SoBo glue) It was very easy, but I'm going to try the next one with chipboard. I have a few basic clamps now that should help, so I think it will be even easier on the next building.
Overall, I think the program is very intuitive and user friendly, although like any software, there were a few minor quirks, but nothing major. I believe when I start the structure building process in earnest, it will be a quick matter to learn the ins and outs of the program. Also, the one structure I build looks pretty good. I'm in N scale, so it easily passes the 3 foot test. The next step is to weather it a bit and then I think it will fit in even better.
I think this program will really take off when modelers begin to use it and start sharing their designs. For example, if there where a website where people could share their designs, then it would be a simple matter to download, modify to suit your layout, then print and build.
Anyway, a very good and useful program and I hope the company continues to expand and improve it.