Oh, gosh. At least 3 years on one of them, and about half-a-year on the other.
I've seen a lot of reviews in which people say that Activia made them extremely ill. Google "activia reviews" or "activia problems" and you'll find some of them.
Oh, and on an unrelated note, I wanted to ask, did anyone else tear their sutures at all during recovery?

You're kidding! I would have never thought they WOULDN'T stitch up the incision. Are stitches uncommon in an LIS surgery?