Upsell, Cross sell & Bundles

As a data and feature junkie, this is pretty streamlined. Might wish for a few more customizations, but their customer service is awesome, they helped my troglodyte ass set the thing up, batted about Matrix references, and after they got it working properly for me, it took me only a couple of hours to set up custom cross product recommendations for 150 items. You won't be disappointed in this app, and I'm sure if I understood coding, I would like it even more. It's, like, 4 3/4 stars rounded up, not flawless, but it does it job really well.