im just assuming a food saver takes 98 or 99% or even more air out, but i dont know for sure. so i just thought i'de ask. Looks to me like with a slightly time consuming 20-25 pumps about that amount (99% or better) of air comes out. I did some tuna steaks, new yorks, rib eye, chuck eye, and some chicken so far. i could see the moister in the bags getting closer and closer to the pump side. to me that seems pretty tight and those suckers didnt leak. i was impressed but have nothing to compare to. Kind of nice to just grab a bag and go. the pump wieghs nothing, and those are the only two parts to this rig. if i remember right the "starter kit" was 4 bucks, and depending on size bags... the refills are around 3 for small and 4-5 for bigger.. or something like that. .....thats nothin to me, im happy. big thumbs up.