Upselly • Upsell & Addon items , 30 reviews
It is pretty close to 5 stars, the manual upsell selection in the admin just needs some work. Selection of items is very very temperamental, with different products I choose getting added as the upsell. You can fix it with 2 or 3 re-selections and saves but makes a manual selection a giant pain. Fix that, and it is 5 stars from me.