ecommerce software

So, anyone out there know what the killer online store software is?

Currently I’m working with creloaded, and am NOT impressed. It’s buggy, requires a tremendous amount of code editing for proper installation, has a limited feature set like no support for local (city/county) tax zones, poorly documented and just hard to use overall – and I bought the ‘pro’ version.

If anyone has thoughts or reviews on store software, please let me know.