I got home tonight and what do you know, it was sitting in by my door. As expected, external finish is lacking compared to the Maruzen but the performance leaves me hopeful. The gun actually seems to have much less wobble than my Maruzen. However, my Maruzen is probably 5 years old, so obviously that plays a part. That said, the Well has a noticeably stiffer recoil spring. I need to do some actual chrono testing, but the mags also seem to come with a high flow valve as the performance of either gun seems much better with the Well mags. The mags, I'm also pleased with as they seem to have done a very good job on them. Obviously, it needs some field time before making any final judgments but so far, for $55, I am very happy with it. Even if just used for parts, that makes it worth it.
And happy days, the Well has a threaded cap, unlike my Maruzen. Yay, no sight block swapping.