For US$110 for the base level it seems way pricey to me.
Advantages or disadvantages is a hard thing to answer. I personally would consider the "advantage" of having premade cables and modules that go together easily and don't require a breadboard to be a disadvantage because I think sticking stuff in a breadboard and learning to tell an anode from a cathode and just mucking about with the parts is good stuff. I acknowledge that it can be frustrating, however, trying to get stuff to JUST WORK and that is what that product is all about.