I just got there info about that school the other day. I also just ordered about $1500 worth of misc. items from them to. I like there hoses, quick connects and many other items they sell. And there prices are the best in the industry.
As far as that school goes it seems like a good deal. The only draw back that I can see is if your machines and pumps are different then the ones that they will show you how to service,rebuild etc. They also will show you how to rebiuld a Kohler engine. None of my machines have that type of engine.
I think they will also show you how to work on the burners. This should be very valuable if you ever need to service your own.
SO is it worth it? Only someone who went can really answer this question.