I use a Kreg pocket hole system all the time. I don't have the master system but it sounds like you are getting it at a great price.
Like NiteWalker, I have used it on many different projects. It seems it was made for face frames, ut i have used it to construct and also repair tables and chairs. They hold my router table together. Made and repaired drawers and cabinets...etc.
You can even get/make plugs for the pocket holes that will add a decorative touch, almost like an oval inlay.
Honestly, its a great thing and you'll find more and more uses the longer you use it.
spiffy