Anyone have any experience with Go E-merchant at all? Like how good their service is or tech support or anything? www.goemerchant.com (http://www.goemerchant.com)

tech support is decent there. Here's their biggest problem:

They are setup for a shipping entity and work great for that. The only way to know there is a successful transaction is that you get an Email stating such. There are NO return codes of any sort. :-(

If you do NOT need any codes return, and getting an Email is sufficient for you, then go with goEmerchant. If you do need codes and want your site to respond to successful transactions, then you better look elsewhere.