Functional but not practical

This plugin retrieves rates from USPS, that much works. But there is not much control over what happens next. Your customers will end up choosing “library mail parcel,” which is the lowest rate, but illegal to use unless you are a library or similar. This will allow your customer to pay a low shipping rate, force you to pay the real shipping rate, and stick you with the difference.

The author does offer a feature to exclude “media mail” which has similar legal restrictions on who can use it. A similar option for library mail would be one solution, although greater control over the returned data would be better.

I’d like to see the ability to include/exclude specific services.

If this plugin displayed practical shipping rates and options, it would be very popular among the million+ people who use Woocommerce instead of the less than 1% who currently use it.