You'll have to be the guinea pig on this one. They are sold by Welduk who is not far from here and they are from SWP who have a good name for their products in general. Weldequip on the top of the forum has a couple of larger models so might be able to help you.
I tested early versions of the Redline Migs for SWP about a year ago and they were well constructed with quality parts and welded really nicely. From memory they are not of Chinese manufacture, instead being made in Europe somewhere.
Recently sold a 210A machine to a guy I've known for ages and he is really pleased with it.
Hope this helps you decide.
Dave