Love it so far! I like the fact that the gems won't come off! Sometimes the ones with adhesive on the back don't stay stuck on. I also like the idea of using these on other projects than just cards and layouts.
You only need the tip that comes with it, and it doesn't take long to see/feel the glue on the back melting! I love that you can also use other brands of heat fix gems! I found some Darice brand gems at Pat Catan's for 25 and 50 cents to test out - they work great too!