As Ryan mentioned, there are some videos on youtube featuring the MPCNC with a laser. I think most of them are using one of the J Tech Photonics lasers. Here’s the one I’m hoping Santa (my wife) gets me for Christmas: http://jtechphotonics.com/?product=new-2-8w-laser-and-2-5amp-safety-compliant-driver-kit-with-us-style-power-adapter.
As far as cutting, I think it depends on what you want to cut. I intend to cut foam board, balsa, and thin plywood, and also plan to use it for engraving metal and wood. I also expect something of a learning curve, as I have no experience with high powered lasers and I think you have to modify the gcode or something to get it working.