I haven't seen that tool (or any pix) of that particular machine Neil, but at a guess I'd say it'll be much the same as any other Lidl or Aldi tool.
That means:
A) According to some on the Forum it'll be complete and utter junk and not worth it even if they pay YOU forty quid to take it away! OR;
B) According to some other members, PROVIDED you're not going to try to earn your daily bread with it, it's probably worth a punt, especially remembering the 3 year no quibble guarantee.
What is it, a "holder" for what is, in effect, an abrasive cut off disc? Or does it have a "proper" circular metal blade, presumably tipped?
Apart from obvious safety factors (like vibration - out of balance/off centre/incorrectly located centre holes), any of which could be VERY dangerous if not immediately nipped in the bud (i.e. take it back IMMEDIATELY), you can't really go too far wrong, as about the worse problems are likely to be lack of accuracy/repeatability, which will be frustrating but at least shouldn't kill you.
What do you want to do with it (yes, I guess "cut metal" (!). But what exactly? Type of metal, size/s, section/s, for what purpose/s)?
Not much help really, just "common sense".
AES