Ditto on USPS. I've found them to be the most reliable and fastest of all the shipping options. Plus, they are the only ones with Cradle-to-Cradle certification, and they go to everyone's house/business M-S anyway, so are not adding any extra mileage to their delivery route, making them the greenest of all the shipping companies. Not to mention that they offer free shipping materials. Hands down, the best option.