Thought I'd give it a try but didn't expect much. I've used it for 2 days and thus far saved about $50-75! Several items I got a $20 discount on, one of those I purchased on Ebay because it was $20 cheaper than Amazon. Amazon is my go to for purchases. I used to check with several other sites to be sure I was getting the best price [Walmart, Best Buy, Ebay] and it would appear that this app does that comparison for me....that's a lot of time saved. So we shall see over time, but right now I'm lovin' it. Hopefully I can come back and update my review later....
I've been using Wikibuy along with Honey for some time now, and while both are very useful, frequently Wikibuy comes up with the lowest price.
it's not perfect, like many such tools it can get the product search wrong and return a low price for a different product or size, but it doesn't happen very frequently, and it is easy to report such errors.
I'd hate to be stuck with just one shopping add-on, but this is one of my top candidates.