INTO THE AM review for ShipperHQ: Shipping & Checkout

We've been using this app for months now on one of our sites. So far so good. It requires quite a bit of learning curve to setup but support is super awesome. They won't give up on you until you achieve what you're looking for. This is geared towards complex shipping rules that Shopify's native shipping functionality (and even some shipping rules apps) are not able to provide. Almost any shipping rules requirements you have can be done here. That said, this is for recommended for complex implementations (e.g., large catalog of products that have different shipping requirements, multiple carriers, etc.). We'll be implementing this on our other sites ASAP.