Our company uses BigCommerce as the host/shopping cart for one of our websites, makeyourown.buzz, offering unique products like organic butter, oils, specialty ingredients to companies of all sizes, and to end-user consumers.
We have been on the BigCommerce platform for about 4 years.
The site we have hosted on BigCommerce was relatively easy to set up and has been easy to maintain too.
One huge benefit of BigCommerce, compared to other carts we looked at, has been the 24-7 customer support. We have called, chatted and emailed their team (really OUR TEAM) at BigCommerce at all times of the day and night, and I do not think there has ever been a problem they did not help us solve.
Although they do not offer every little feature we want on a website, they do have developer partners that are there to help when we need them.
We have been very pleased with our BigCommerce store, and when we develop a new store it is very likely it will be with them.