RocketShipIt is the baby of Mark Sanborn, who has spent the last 10 years working with these shipping APIs. You'll get next-day support directly from the founder, who wrote the code and knows a thing or two about shipping :-)
Yes, RocketShipIt is software you use on your server that communicates directly to the carrier. This ensures the fastest possible response times and privacy.
You bet. Since RocketShipIt communicates directly from your servers to the carrier. Data is never shared with anyone except the carrier. Everything happens over a secure TLS connection. Your credit card is charged securely offsite via Stripe.
If you're unhappy with the product in any way, we'll gladly refund your purchase.