It's generally not a high quality product as far as resins go, so there's good reason to dislike it.
It's good to get your feet wet though, it's where a lot of folks get into this part of the hobby, but for me I was intro'd to smooth-on, and I've diversified from there so I learned about other aspects of casting, other products, etc... Then I've just learned on my own through trial and error, read up on things when I can, gotten to know professionals and their uses and methods...
I don't know that you'll find the set useful or not Paul. I know many have found that kit to be a cheap way to start though, and get a feel for what you're doing.