I cannot emphasize this point enough. It’s certainly better now than it was when I started on it, but this is a machine that requires a fair amount of patience and a determination to see it through.
Other than that, I can get into a little more detail on the issues with the stock Z-axis. The motorized Z using the router base is, while usable, problematic. Accuracy can be an issue, as there is a fair amount of play in the depth adjustment lead screw assembly in the router base. There are ways around this, but I noticed that there would be slight steps between passes in pockets. It’s very minimal, and can be sanded out with some patience. You can see what I’m talking about in the dadoes of these two cabinet ends (zoom in):
Other than accuracy, I’ve also found that it isn’t very reliable. There have been many reports on these forums of the router base components failing during use. I, personally, was able to run my machine for about 2 1/2 years with little issue before the router base wore out so much that the router would bind in the base during large Z moves. The couple of times it did it to me before I retired the old router base it often happened on retract moves, meaning that the bit would still be in the material when it would begin to rapid to the next toolpath. Thankfully, the Maslow’s rapid speed is slow enough that it just cut a groove rather than snapping a tool.
There are solutions to this problem, ranging from 3D printed parts that solve at least some of the reliability issues, to new Z-axis assemblies. The two main contenders for the latter are my own design (the Meticulous Z-Axis), and Metal Maslow’s sled. My design is a cheaper, DIY solution, whereas Metal Maslow’s one is more expensive but less work to get running.
I want to sum this all up by saying that, despite it’s problems, the Maslow is a fantastic machine. I have been able to cut cabinets and other furniture with it very successfully. The price point vs the work area is a great selling point. If you do take the dive, though, be prepared to spend time getting it working and dialed in.