Forum Moderators: buckworks
Its very easy to use, and the support is great. The only negative is that the pre-supplied templates are pretty poor (as most templates are in general anyway) so I would recommend building your own template or getting a free one from the the internet.
If your integrating into an existing website then its just a case of copy and pasting in your HTML code from your existing site, fair easy really.
I don't know the first thing about this cart so I have little to offer here. If it's your first cart, I highly suggest you do some research in advance about what you're going to need/want for tools and options within the cart. Reporting features (sales, pending orders, canceled orders, most popular products, etc...) are highly valuble as are the options for manipulating products, product descriptions, enabling sales, using different payment gateways and a host of other points that not everyone considers.
But then, if you've been in this game for awhile, you already know all this. :)