Thinking about the Bluumax Gantry Router

I have been looking at videos and posts about the Bluumax gantry router (kit) from http://www.bluumaxcnc.com. For $415 you get an almost ready to run kit. You only have to supply a few pieces that are heavy or that you could source more inexpensively in your local market or online. Basically, you have to provide some MDF, lead screws and a 24V power supply.

The gantry towers are made of plexi and some users say that they can add a little flex to the design. There are some posts and images on the bluumax yahoo group that address this. The prime alternative is still the McWire instructable.