I tried this over a year ago and was disappointed: the better prices on Amazon were few and often referred to products not exactly the same.
I just tried it again and went through my extensive wish lists and got the same results. A few cases it found one better result on Amazon, but Amazon already had that listed under "Other sellers" - in one case, Amazon's "Other Sellers" list had one better price than Honey found.
I'll keep trying it for a while, but expect it to be a waste of time.

Rarely saves me any money and it's annoying

It is really good.
It helped me to find best price.

Just saved >$75 on a single order!

YES Theory Squad

A must have App. So helpful!

Absolutely terrific! Great performance. Really works.

Aus perspective only. Over tens of purchases, never a single coupon was applicable. Zero use.

Showed the best coupons and amazing discounts

i didn't even notice that honey saved me money before it popped up and had a cupon ready for me.