Caveat: I don't have any Anova products, nor will I ever buy anything FoodSaver branded ever again (those shouldn't be discussed here.)
I have a funny feeling that the Anova chamber sealer is not drawing down a hard enough vacuum prior to sealing. The potential of a poor hinge design certainly could exacerbate that situation. Long term, I'd expect that to lead to freezer burn, and avoiding that sort of thing is exactly why I vacuum pack food.
Secondly..... that is a small chamber. No way I'd be tying up storage space for something with that small capacity. I've vacuum packed up to 6 bone rib roasts, and usually do 2, 3, or 4 bone roasts.
In regards to bag/roll sealers.....the sealing area has to be as close to squeaky clean as you can keep it. I've successfully bagged up liquids and vacuum sealed them (Ary VACMaster,) but it's miserable at best. I do make spaghetti sauces, chicken stock, chili, etc, portion those out into mini-loaf pans, freeze, them vacuum pack. That's just like anything else solid.
Tl;dr: Good review. I'm pretty sure that with an equivalent experience, I'd have done the same thing.