EDITED TO ADD IN 2024
I was going to downgrade this to 2 stars because of my cash back problem. I've been using it for years and getting the discount posted, so that's worth a couple of stars. However, the cash back enticement... In the years I've been using it, I have not gotten one single cash back reimbursement that the site promises. They said I needed to be logged in, and I've ensured that I am. But I never received cash back. Rakuten automatically sends (or sent?) it when it reaches a certain amount. RMN didn't tell me that I need to go to their page and manually request a payout. So that's what I did. If you don't know to do it.. well..? Now I do.

ORIGINAL REVIEW IN 2020
3 Pros:
-I feel safe with RetailMeNot.
-I've been using the website since before apps or browser add-ons were "a thing" and RMN often has a code that others don't.
-You can go to the RMN website to look for more.
The add-on isn't so pushy like some others are so once you dismiss it, it usually stays silenced; but if you want it, it's right there on bar.

3 Cons:
-On the flip side, sometimes they don't have anything helpful but at those times, most other places don't, either.
-The add-on isn't so pushy like some others are so once you dismiss it, it usually stays silenced; but if you want it, it's right there on bar.
-If you don't go to the website or check otherwise to be sure you're logged in at RMN, you may not get what their offer says, so you need to make a note of it until you see it has appeared in your account.

I'd still use it anywhere available. In all the years I've used it, I've gotten a number of discounts (although some didn't end up in my account and now I know better); but I've never ended up with anything aggressive on my computer -- just some minor cookies.