Welcome back! I love my Accuquilt - don't know why I took so long to buy one. Just cut 2 layers until it is 'broken in.' It's a bit stiff at first. After a while you can add more layers. One of the first things I did was a top with lots of HSTs. I put the fabrics right-sides-together & picked them up and sewed them. No matching corners etc. And the dog ears are already cut off. It makes HSTS so easy that you'll never avoid them again.
We're all different as to what we love it for, but I've noticed that most of us like the 2-12 inch stripper. I use mine for both borders and for bindings. If you have 15 dies, you are well set up to cut just about anything. Have fun!