I love mine, too. Not just for freezing. You can reseal snack bags. You can use the jar attachment to save leftovers. The canisters work well. The bottle topper is great for that half-bottle of wine.
If you're shopping, check ebay. I got the FoodSaver Professional II model for $130 brand new. There were a ton of them on Ebay. They go for $320 otherwise.
I don't use too many bags, and I reuse them as long as possible, but when I need them, I buy them at Costco.
The other day organic bananas were on sale, so I bought several pounds, cut them into chunks, froze them, then sealed them in bags for future smoothies. I make a double batch of cookie dough, scoop it into spoonfuls, freeze them, then seal them -- that way I can bake just as many as I need , instead of a whole batch. Especially handy when you get a last-minute invitation somewhere and you don't want to show up empty-handed!
We make a triple-batch of homemade pasta, let the noodles dry a little, then twist them into nests, freeze, and seal.
I reseal cereal and cracker bags after each use with the manual seal button (doesn't vacuum, just seals).
My list goes on and on! It has definitely paid for itself!