My mails (asking for an order confirmation- didn't feel right just sending you a paypal payment and waiting) went unanswered, so I called. It took three calls over two days to get through (all operators busy). Eventually I got through, and got a tracking code. The code still doesn't show up in the usps system (But apparently it can take 3-4 days to appear, usps must be using pigeons to sync).
Personally, I have had many better experiences on ebay, but I understand you're launching a product.
All in all, I'd give you a 3.