I have one and use it HEAVILY during hunting season. All our meat gets FoodSaved. I also use it when I buy whole pork loins, I cut them up into chops, and FoodSave 4 chops at a time - what DH and I usually eat (he gets two, I eat one for dinner and one for lunch the next day).
I have the actual brand one, lemme find a pic. It's a "higher" end on, but it was worth it to us with the amount we use it at one time. The hold and seal ones were too much of a pain. This one is automatic, just put the bag in, flip the lever and push the button. If I process a deer, I'm packing anywhere from 50-100lbs in one sitting into 1lb portion bags. That's a lot of FoodSaving!
Mine looks like this (or is this, dunno):
Amazon.com: FoodSaver V2440 Advanced Design: Home & Garden
I use the brand name rolls because I've used gift cards to buy them, but want to try the enormous ones off ebay. I plan to save the cores from the brand ones because the one we have has the roll storage in it, which is really handy when I'm trying to make 100 bags in one sitting (I seal, pull, cut, seal, pull, cut, etc).
Very occasionally, like every 50 bags or so, it doesn't make a complete seal the first time, but you can tell, and just have to stop and reseal it. I've not had problems.