If you are a programmer then it will not be hard, and is a very good for making cheap websites. Is true that is a little annoying to make changes in the oscommerce for the first time but then you get use to it.

Is a very good open source solution for e-commerce.

Of course a lot of things can be improved in it (is not perfect) but the most important things at the oscommerce are the contributions.

"And what company will make you a webshop better than oscommerce at a human price?"