I have been used Virtuemart for last 3 years, but after I tried EShop (demo) I decided to give this app a chance and never regret it! It's worth of any penny I paid for it, and what is the best thing - you will experience the best support among Joomla template&extension providers!
I bought this extension yesterday, got the download link in a few hours, spent a few minutes for installation. Everything works perfectly! So many options you get with extension.
And most important of all...I had some issues concerning module. I contacted Artetics team via email. They answered in 5 minutes, solved my problem in a sec