I tryied this extension because I wanted to set up a joomla 3 e-shop and I had no alternative. I have to say that I am really impressed. This is my favorite e-commerse solution now. Most easy to set up, bug free and full of very usefull functions. A complete e-commerce sollution.
The only problem is that everything except the free package, is very expensive and you have to buy it separately for each website(licence codes). If it was cheaper to use, or if you had to buy it only once, I would definately never use anything else again. I would give 4 stars because of this, but they deserve the 5 stars because of their good work. Lets hope that you 'll do something about your prices guys! cheers!