I like Cleverbridge's cart-customization ability. Unlike other platforms, whose cart pages layout are always the same, Cleverbridge can create cart layout according to your own design, or even better, they can recommend one layout for you according to your idea. I also like their attitude to the clients. For example, we get Quarterly Review every 3 months with our account manager, and I can always get some new ideas from it. Also, I like the MVT campaign feature, which makes the split tests between layouts and prices much easier. The last thing I would like to mention is that their customer support team are very good. They can take direct requests from customers on behalf of us, and also communicate with our own support team.
One thing to improve: one cart layout normally takes 2 weeks; it's always better if it can be shortened.
We are a software company. We use Cleverbridge as our e-Commerce Platform. Basically, Cleverbridge handles payments for us; also, it manages affiliates for us. The last, the split test tool build-in their system is very good and helpful.