I have bought 2 CNCDIY machines over the last year and a few electrical accessories.
My first was a 3040, the second a 2520. The 2520 goes as fast as 180 in/min (not cutting of course). That is crazy fast.
These machines are very good. I use them for:
3D milling of plastics
I have used them on aluminum, but since I have bigger machines, I usually don't do this.
I have to say that I am impressed. My second machine is built even better than the first.
There is not a better machine, even for 3 times the price. Shipping is fast and they are HONEST. A part got bent in shipping, they replaced it FAST.
I have a CNC gluing application. With a few mods, I want to use one of these without the spindle. I will substitute an adhesive dispenser.
I use MACH3 and CopperCam.