I was happy with the machine that Phill built which is why I bought the book & started to make it but then I found a couple of CNC forums on the net & started reading. Read quite a lot of posts where people said that they weren't a lot of use & were a waste of time & money. Things like them being to flimsy & problems with the rollerskate bearings etc etc.
Main reason for going down that road was that it was a very cheap machine to build & as I don't have a lot in the way of money it seemed like the best way to go but it doesn't really matter how cheap it is if it doesn't work properly lol. Chances are if I had started reading the forums before I started to build it I might not have bothered with it at all.
It was to cut Foam pvc, & composite board mainly but it would have been nice if it would also cut some woods & possibly acrylic, I knew that it wouldn't stand a chance with anything like Aluminium but I thought that might come latter if I got a better machine in the future.

I'm ambidextrous I can work with either wood or metal lol but the main problem when it comes to metal is that I don't have any tools that are really suitable or access to any so that's a bit of a non starter. Reasonably well kitted out for wood though because of the business I still run part time. Don't have any sort of cheap supply for any sort of materials to speak of, no one falling over themselves to give me stuff either.