Flair Product Badges + CRO

One of the best apps I've seen on the Shopify app store.

Pros:
Loads super fast (both on the back and front end).
Modern badge and banner templates (looks great out of the box).
Super customisable (easy to make it match our brand look).
Decent support docs (even for a non dev like me).
Stellar service (Adam is prob the most helpful dev I've ever met).

Cons:
Not a one-click install (I'm not a dev and it took me some time to figure out where to paste the codes but had help from Adam).
May need some time to understand their concept of layouts and their targeting/filter settings to make full use of the app.