Quality is fairly good, which you don't think of for products manufactured in the UK, although the anodizing was chipped off on on edge of spout when I unpacked it.
I have tested it a few times. Some reviews complain about leakage at rivets, but I didn't have any of that. The instructions tell you to test it once and discard the water. I did that and there was some white residue inside after I discarded the first boil, some of which I could stick my finger in and wipe off. I have done 2 more boils and discarded the water, and I think that is most of the white stuff. I think the white stuff might be a sealer for the seams and rivets.
Overall, it works pretty good, although not quite as fast as some people say to expect. It does have to be fed a little since the materials first used when lighting it don't seem to be quite enough to get it to boil, and it needs a little more. Put the additional fuel in too soon, or too late, and it goes out.
This review was written in the old system and had content requirements that are different than reviews written today.