Pros: A few different functionalities we didn't have before.
Cons: It didn't ever work well.
Overall: I am an independent consultant for a company which recently employed ByDesign to upgrade their e-systems. Some things we did not have at the time (support tickets, link the warehouse inventory to the ordering system) were fun. But after a year and a half of development, they still gave us an incomplete product at go time. We could not even close a party for nearly a month -- alienating our hosts. After a few months of very little improvement, our company went back to its proprietary software. We were ALL glad to say #ByeDesign.