Once I began to figure out how JooCart is organized compared to Virtuemart, I found JooCart very easy to use. But MOST importantly, the JooCart support was very good. They were responsive, and even though they are separated by many time zones from where I am located, all of their help came in a timely and courteous manner.
I will definitely recommend JooCart to any future clients of mine who need a shopping cart, and for what you get, the price is VERY reasonable.
The one thing I would like to see in future versions (I don't know if this is possible or not): using the JooCart back end requires you to log into it, even though you are already logged into your Joomla Administrator area. This means you have to login twice to access the cart back end. Not a BIG deal, but it would be easier if you didn't have to do that. I wouldn't let that stop me from using JooCart.
All in all, a well executed shopping cart solution for Joomla at a very reasonable price and with responsive provider support, and I recommend it enthusiastically.