They are pretty well-made, an offshoot of their jukebox technology. You will only be able to play the full side of an album (not individual songs), unless you press reject to move on to the next selected side. You will probably need to do some lubrication of the mechanism, but if their service manuals are anything like the ones for their jukeboxes, you should be able to cope with just about anything that needs doing. The cartridge is special (it has a stylus on both sides, since the tonearm carriage is shifted to one side or another to play the record, which is played in the vertical position).
Always Jukin' magazine sells a set of repro manuals for these (the HSC1, 2, 3, AP-1 & 2), you can get it at
www.alwaysjukin.com
Have fun! They are definitely unique machines.
--Bob