You'll love that Vac-Sealer from Cabelas ....
I have had mine for 2 years and have not had any problems with heavy usage.
The benefit to this unit is that it is user serviceable and all parts are readily available if there should ever be a problem. With other manufactures units there are no repairs or parts available as they are made as disposable units.
I used to use rolls when I first got mine, they worked fine, but when your volume increases (like making Jerky, sausage, bacon, ect) they become a pain to work with.
You can order Weston bags in boxes of 100 or 1000 on amazon.com, whatever your needs are.
Humphrey's DownEast Beast W/BBQ Guru