I'll start with the few things I think this seller could work on and then transition to the things they do well.
The parts are too large in the x and y directions (I assume that's due to heat warping before the layer cools). This makes it hard to fit things together if the tolerances are lower than about .5 mm (I found through testing my cad against the physical model).
There were a few cases where I noticed that a layer had slipped out of place with relation to the other layers (mostly on the gears). This did not create any problems after I assembled it, but I felt it worth mentioning.
For my purposes, this was fine. I just needed to quickly and affordably prototype. However, it is important to keep in mind.
This seller is great to work with. They are understanding, affordably priced, and reasonably fast. I would say more, but it seems I've run out of space.
Overall, I would recommend this seller to a friend.
