I am running my e commerce business the 4th year now. 6 months ago i signed up to esellepro to streamline my sales process, however, they did not manage to get all basic features up and running even after 4 months. I paid 3000 usd for the integration, which i mean opinion is just a big rip off. At least they refunded me the money.
They hole solution is online, I had very often the situation where the servers were down and i was not able to do my work.
I can only everybody recommend to stay away from eSellerPro.