Free Forever Green Bags Today (only pay shipping)

I haven't used these before but have heard good things about bags like these. I read a few reviews and there are mixed reviews as to this brands quality. I wonder how long the bags last and if you can re-use them a lot or if they fall apart or get gross quickly.

If you're interested, here's today's deal; I haven't ever bought from this site before, anyone have any experience with them?