You'll LOVE that thing! If you've got a shop vac, skip even putting that bag on, it's a useless piece of frustrating crap that ends up making a bigger mess when you have to empty it. Hose on the end, and fire away!
When you go to buy biscuits, don't open the things before you need 'em, they'll absorb some moisture. Also, after you've opened the container of biscuits, throw them into a ziplock bag and throw the whole bag back into the container. If the first biscuit you throw in there is tight or loose, keep testing 'em out until you find one that slides in there nice and easy. To make it easy on yourself in the future, you might as well test the rest of your container. It'll take a few minutes now, but once you've got 'em all sorted, you'll appreciate it later! If one is too hard to get in without a mallet, take a pliers or vice-grips and squeeze away until you get it to fit better. For thinner ones, when the wife is taking one of those nice steamy showers, let a few of 'em sit out on the counter in the bathroom and then bag 'em up afterwards. They should fit a whole lot better.
Edge-joining pieces of plywood becomes a whole lot nicer, they're great for alignment purposes, heck....all kindsa stuff! One thing you'll want to make is a right-angle jig for keeping your biscuit cutter safely on the workpiece and at the proper angle to the material while keeping your fingers away from the thing. Just a simple right angle made of two pieces about the same size as the face frame of your cutter. You'll learn soon enough what you'll need it for
