PreOrder Globo | Back in Stock

Good customer support. I have tried lots of apps to setup preorder. Mostly failed because we fetch product variants as separate products. But here customer support quickly solved my problem and it works like a charm.

Also one of few apps which alerts on Mixed Cart (preorder and not preorder).

Restock e-mail notifications aren't really useable in multiple languages and multiple markets, because they can't work with different language and market URLs.