Ordoro seems to have all the missing features you may want to add to your Shopify store & they provide great customer service! I could call or email them and receive instant feedback. They walked us through each step of the integration before we even purchased the App.
Overall, great to work with!
Update: April 2017
We are still using Ordoro and absolutely love how they have grown with us and created new functionality for today's fast-moving e commerce space. I can't imaging using another system. Thanks Ordoro - your app rocks!