the guy only wants to work in wood acrylic and brass, i have one of the dreaded, i use it without a problem once its limitations are realistically accepted, wood no problem, acrylics and plastics, as long as you dont let the stuff get too hot or try to work too thin no problems, brass, now this is the fun one, as is then it can be a problem, anneal the stuff and it works no problems, steel - never tried it bar polishing up but dont think it would have the guts, copper, no probs, alluminiums/alloys, depends, some bar stock is hard as nails, other stuff is fairly soft, sharp cutting tools and small cuts is my answer to most jobs, end the day im not working with a student lathe
as supplied they are iffy, mine lives bolted to a piece of worktop and being less inclined to move is better, the supplied collets - absolute crap being plastic, the older plastic chucks are useless, the later metal ones are better, theres two distinct versions, one ran on 6 volts and is underpowered, plus some also had the main beds as plastic as well, the later version is 12 volts and for what i use it for ideal, the main beds are alloy, two of the uses, hand sander and hand drill, i think the motor and headstock units are too large, dremels and similar are better, the jig saw, mmm its never going to cut straight and plastic gets too hot using the supplied blades, ok for roughing out soft wood
upgrades needed, a proper set of metal collets, a proper revolving center, the grinding attachment for making your own cutting tools, ideally a four jaw chuck to compliment the three jaw and a 12mm thread drill chuck for the tail stock
funny enough i borrowed a mates peatol the other week to turn a barrel, same issues the unimat gave me, basically im too heavy handed and try to cut too heavy on small items
one thing i am seriously considering, either making or buying a speed controller for the unimat, the two speeds it has are just not enough to cover everything
the time consuming to change from one mode to another, its going to be as you only get the bits to create one function unless you add more parts, then again looking at the larger unimats and similar, you have to take those apart to create a milling machine/drill, unless of course you pay a hell of a lot more cash