I've been nukking FS bags since I got my first FS in 1988. The bags ARE definitely microwaveable. You MUST vent the sealed bag when using in the microwave. Since I reuse all my bags, I clip a corner from the bag, but if you don't plan to reuse the bag (a VERY big waste), you can poke several holes in the center for venting.
I often place plated meals in the bags, seal and freeze for anotherer day. Recently found a number of rolls that were misplaced in a move 15 years ago, so have been using them. No difference between those and the newest ones.
I also use the bags to make 'boil-in-bag' entrees for several families that I still do PC work for.
