The costco one is the one we have. Just an 8lder model, we got our like 3 years ago. It is decent, but not great. It does a good enough job of sucking air out of bags with dry food, but when you have any type of moisture, it "sucks". Even with the "moist" option selected, I have to go through the process 3 or 4 times to achieve the result I want. So as soon as the vac cycle ends and right as it starts sealing, I turn it off and start another vac cycle.
I had an old foodsaver before that had a "more" button. Pressing it extended the vac cycle. It was awesome.
Other than that it is fine.
Is it the way to go? For some things, yes, but only if you end up using what's in your freezer instead of buying fresh because it is more convenient.