I am not technically minded at all and found the setting up of Aceshop to be a breeze. However, I have a fairly complex multilingual, multicurrency site which I wanted to combine with Acesef and ran into some configuration problems.
The support I received from these guys was nothing short of spectacular as it took several weeks to iron out all the issues. They were patient, courteous and very professional at all times and I am delighted with the final version I have of my site (www.cannyco.com). I wouldn't hesitate to recommend them to others, particularly as if, like me, you are a bit unsure as to which cart option to choose. I used to use VM but Aceshop provides your customers with a far easier and user-friendly experience. And the customer support is the best you will ever receive.
If you are unsure which cart product to buy then go with Aceshop - you won't find a better combination of product and after-sales service anywhere.