I bought this to vacuum seal about 25kg of fresh salmon I got given.
It coped admirably and we were all done after 4 hours. A handful of the bags didn't have all their air taken out but I was able just to slice off the top (I'd made the bags a little bit too big) and on a 2nd attempt they worked perfectly. I think my few glitches were down to user error and the sealer receiving heavy use straight out of the box rather than any flaw in the product.
Overall an impressive tool. Not used one before so have no real reference points and I'm sure there are better and more powerful models available but this works extremely well and is tremendous value.