Excellent postage provider with warehouse integration

We’ve been using easyship with WooCommerce for about 3 years. It’s never given us a problem. The only time we’ve contacted customer support is for shipping issues such as lost packages so they can follow up with the carrier, and they have been reasonably quick to respond most of the time.
I’ve compared shipping price with some other discount postage providers, and they are similar (all about the same actually). Though you might have to pay annually for a plugin for some other providers where easyship plugin is free.
Customers like that it gives them carrier choices and shows what the import tax will be, if there is any.
The biggest, and really only downside with easyship for Woocommerce is it doesn’t support using multiple warehouses in different regions. So if you have some inventory in Netherlands, and some in USA, you can’t use shipping Zones and Classes to get local shipping rates, or direct orders to the appropriate warehouses. The solution is, use a different postage provider plugin for a different warehouse. This is really a shame, because easyship has warehouse partners with ecommerce fulfillment around the world, but you can’t use more than one warehouse with Woo.