Ship&co works very well for our Shopify stores.
Multi stores and multi carriers integrations. Even multiple FedEx and DHL accounts.
Easy to set up (took us less than 10 minutes).
Create Shipping labels in 2 or 3 clicks. Review collected by and hosted on G2.com.
I am looking forward to a sub-users feature to get a different level of access inside the app. Review collected by and hosted on G2.com.