XYZ-Tech CNC Router Structure

Hey everyone, I've been planning a CNC Router Build but I just found a 3 year old 24"x48" XYZ-Tech CNC Router locally. I've read mixed reviews on here about these machines but most of the negatives seem to be around the electronics and packaging. I'm primarily concerned with the construction and rigidity of the structure. The machine is cheap enough that I can replace most of the other components. The hardest part of this build would have been the frame so this would be really convenient. The hardest thing I would be cutting is Aluminum. Thanks for the help.