i use 2 kinds of bags.
the food saver, i use the big roll basically cut to fit, this is great for 1lb steaks or ribs.
i also use ziploc bags, but the vacuum ziploc bags with the hole and the manual pump.
Amazon.com: Ziploc Vacuum Starter Kit, 3-Quart Bags, 1-Pump: Health Personal Care
you'll never find the info, but these are for sous vide. on the bag it even says "sous vide" and it has an extra layer of plastic on the inside, it's a criss cross pattern and there's no "smell" plastic taste.
i use the ziploc vacuum more, especially if i do a wet marinade or something, cuz no matter how hard you try, some liquid will get pumped out, and it's downright nasty to try to clean it out in the foodsaver with all the crevices, and taking out the foam.
with the ziploc even if it comes out, into the handle, it unscrews and breaks apart in 2seconds, easy clean.
ziploc bags can probably be re-used 3 to 4x before i notice it looses "vacuumness"
actually i'm getting ready to visit a friend in VA and she wanted to try out sous vide food, so i'm bringing my sous vide controller, some frozen fish and steaks (seasoned/dry) and the crock pot, i asked her if she had a manual, switch type crock pot and she said "i think" so i have to bring my crock pot just to be sure, this is actually where the anova would be cool, i'd just have to bring that big... vibrator looking thing instead.