Tragically I found this happening too, especially in the one I use to freeze caramelized onions. It’s not a complete fix, but I’ve found that adding a tablespoon or two of baking soda, some hot water, sealing and shaking it up can help. Letting it sit for a few hours can also help if it’s a more persistent smell. Their site also has a few other tips for getting rid of smells!

I’ve been using Stasher bags for freezing a lot of chopped veggies. I’ve only had mine for a little over a year but they’ve been holding up surprisingly well, only had one get a hole so far but that was due to my roommate poking it with a very sharp knife. That one is still usable though, just not for anything that leaks or needs a good seal. Not sure if it’s necessarily BIFL but I don’t see myself needing to get replacements for a good while. Plus I discovered that you can write on them with chalk markers for labeling!