Mine has performed like a champ so far. Our schedules are so demanding at times that it's a lifesaver. We can fit a casserole dish in and seal it up for later use. We've used ours a couple of times a week on average, and sometimes more often without a problem.
You can buy them new as well and it's a great unit. I think it comes down to what your needs are, and how often you will use it. For anything that has a bone in it I still pull out the Foodsaver bags, but other than that we need to be packing up a lot of food to pull out the retired Foodsavers we have in the pantry.
My .02