I bought into an assembled QU-BD mill/router beta in December 2012, supposedly the machine was working and just needed the mass production and shipping bugs worked out, to be shipped in a few months. I finally got a box-o-parts in April of this year (16 months) because a couple near-locals drove down to QB's HQ and picked up several machines. Still waiting for the missing assembly parts despite many emails and occasional promises of shipping, and have never received the spindle, vfd, cooing package, etc. To be fair, they did ship some missing parts along with a few duplicates ones I didn't need.
I'd be very careful about buying into this. Printrbot's certainly not QB, but there's still some risk. Did they forget to mention maximum part size, type of spindle (if any), cutting and travel speeds, or any other specifications, or was I just not paying attention?
WRT to marketing to schools, I just tried to buy a CNC lathe that was sold to schools as a trainer in the 80s and early 90s. Lots of them ended up essentially unused in a corner, then dumped several years later. Our local schools seem to pour big money into things like this (one just bought a seriously overpriced $40K laser saying it would be good to train students to laser engrave footballs, hopefully the moose gazette did it's usual misquote with that), then find out they aren't worth it. Watch any (at least here) school board talk about "technology upgrades" when they mean buying short lifetime PCs along with things like this CNC machine with 30 year bond issues, seems like they might have above average gullibility to high tech salespeople, or maybe that's just my mistaken impression.
Unfortunately while the lathe was a local seller (rare in mooseland, also not a school), he'd sold it offline a month ago and forgot to remove the eBay offer. Found out when I tracked him down since he didn't answer email or offers - good thing I didn't click buy it now instead of best offer.
Modified KickStarter Classic Plus 7/2012
KS Thingybot Delta Pro 10/31/16
Creality Ender 3 Pro 12/2019