I like the BS keyboard of these Wheelwriters a LOT more then the Model M, they feel a lot most crisp and refined, a bit like a mixture of a Model M and F. The Key caps are a lot better then the Model M caps, better texture and fell more solid when typed on, but that's my opinion. But the caps are one-piece (whish I prefer), not 2-piece like the Model M ones, they also have some quite prominent moulding marks on the back, much more so the the Model M ones. Altogether I would say pick them up when you can get one for very cheap (under 20 bucks), but 50 would be way to much for me, considering all you can use are the caps. It also takes up way too much space, and you would have to dump the machine, or otherwise dispose of it.