I've owned a new 16.5 for about 16-17 months now.
The build quality of the machine is professionally executed, in, and out, totally first rate. Nothing I've found was haphazardly put together, to give any dislike to. All internal wiring is neat, bundled, properly executed, the assembly of the MFD Laminated Case is done precisely, is extremely neat, no sloppy assembly at all in that regard.
Fancy woods-materials, or better quality materials for Wand Tower Assembly, which is Delrin, the use of something other than MDF Platter, and some more costly components would add to cost, but essentially do nothing to improve the cleaning efficiency of the prouct.
As I once believe Harry said himself a long time ago, his priorities, were to make a good machine, that the masses could afford, and I believe he has accomplished that goal. Mark