They look like nice bags, but I'm not a fan of vinyl in bags that I plan on being around for a while in poor storage. In my experience vinyl leaches easily...onto stuff...especially in high heat (in the car, etc). Additionally, it eventually becomes brittle and useless. I also find the vinyl to be much heavier than if it were solid nylon.

Added up, there is extra weight and much shorter lifespan. Since for me, they may end up in a car trunk for years on end...the shorter lifespan and greasy crud vinyl leaves on stuff when it degrades is undesirable.

However, in the short-term...the bags look very handy.