Good Package, Good Value
I finished assembling my kit yesterday, and decided I would write a review on it, since there is not currently a great deal of info or photos out there for these kits.
Bottom-line: overall, it's a really good value. Most of the pre-built powered pedalboards are cheapo and kind of junky, and with this kit, you know you are getting high-quality components to build your own. If you purchased all of the pieces separately, it would be about $50 more, so the bargain is nice.
Why did I dock half of a star? The installation of the power supply is... what's the word? Unpleasant, maybe. The instructions say that the brackets are fit specifically for the Pedaltrain board, but they do not fit cleanly at all. Another review mentioned bending them--you either have to do that, or just accept that they are not going to fit cleanly (see my photots in the link below). They also say you will not need to drill, that the screws will simply bore themselves in if you use an electric screwdriver, but I did not find that to be the case. I had to drill, and it was actually kind of tough. Drilling through metal is MUCH different than drilling wood or drywall.
Anyway, check out the photos. You can see that the brackets are not really cleanly attached, but I don't think it's going to be a problem. It still feels pretty secure, and this is UNDER the pedalboard, so it's not like it is going to take a lot of abuse. Overall, I am happy with the kit, and it's not Sweetwater's fault that the mounting instructions suck--they were written by 1Spot.
I also included a couple of photos of the final product, so you can see what it looks like put together. I don't have many pedals at the moment, but I think it will still give you a good idea of the overall size. (Keep in mind that I have a HUGE Vox footswitch taking up about 25% of the space--there is actually room for quite a few pedals if you don't have something huge like that.)