Yes, I'd never used it before. I followed the instructions of "Workin with Wolkon" on YouTube and it was a bit of a learning curve, but really good once you get the hang of where all the tools are and how to use them.
Yes absolutely, I have lots of CLS in my garage ready to go. Just not sure if 2x4 sistered + noggins between is sufficient to reinforce the joists, or if I should be using 2x6 or bigger.