While still under warranty my Foodsaver V2490 started pumping and sealing prematurely. I called their CS and they hipped me to occasionally re-moisturing and rotating the upper and lower seals and it worked like a charm, they even sent a replacement set gratis, but I've never had the need to use them. Couple years later, the sealing tape developed a ridge and would end up with faulty seals that just got worse.
I told myself when this dies I'm getting the Weston 2300. Someone posted a link just before Christmas from this site http://www.thehuntersbutchershop.com...-Bags-s/42.htm
and they had the best deal around with free shipping and bags. So keep an eye on the prize.