My apartment was listed on Truila, I found it on Findy. My chairs were listed on Craigslist, I found them on Findy. I haven't found a dog yet, but swiping those on PetFinder with Findy is way more fun than Tinder.
Pros:
Anonymous browsing with customized results Eliminates bouncing between marketplaces Clean and consistent interface Hyper-responsive dev team
Cons:
None. It was sluggish with long-tail search, but their cache is populated/updated by users searching and it's gotten miles faster.