Aye, it may be, and no doubt good as a teaching tool, but I can pick up a Jobo tank and a changing bag for half the outlay of the full set.
Plus, extra spools? You can't dry a plastic spool with a hairdryer (they melt easily) and you don't always want to wait until the next day to do roll number 2.
Neat idea, though, and I'm sure they'll do well.