I was kindly given a cheap Impact Wrench for Christmas: Hilka 24v 200Nm..... absolutely useless and couldn't even undo a wheel nut when fully charged.
So I sent it back and got my money back. Ended up getting one from Von Haus instead which has quite good customer reviews, also for £80 and so far it seems really good. Very powerful compared to the last one!! Goes up to 240Nm apparently and I believe it.