My recommendation would be based on the following:
1. How much are you willing to pay?
If your budget is tight, this is probably your solution. Sure, I am constantly frustrated with Volusion's inability to keep up with me, BUT at $200/mo for a ton of features and almost flawless order management, I have to be fair.
2. What features do you need?
Do you need Google Trusted Stores, Google Shopping Integration, eBay Integration, Amazon integration, etc? Or really just order management? If you don't need the bells & whistles, you can probably get away with a cheaper or same-priced platform. If you're a full-fledged web marketer, this could be what you need.
3. Do you need integration with main workflow software?
If you're just ecommerce, this doesn't matter. If you're like us and have offline orders too, this can be a problem. Look into it. Ours doesn't integrate so we've custom-built a solution ourselves (Huge pain - still, worth the money saved). There are other, better solutions out there for businesses that are on & offline, but they're costly.
4. How experienced are you with web development?
I'm assuming not very if you're looking for shopping cart software. If you have enough understanding to do things yourself though, this software could be frustrating. There are definite limitations when it comes to customization, which is likely on purpose. Their support team could be less knowledgeable than you (though they won't admit it), so you'll spend too much of your time dealing with someone who thinks you're the idiot when really, you actually understand how things work far better than they can rationalize. Basically, they get in the way a lot. So if you need to be cutting edge, have access to integrate on your own, have access to all of your design... look for something that is less rigid and lets you do your own thing.