Solid Commerce is an inventory management tool similar to Channel Adviser. It helps to list your inventory to the various marketplaces such as eBay, Amazon, Rakuten, Newegg, Sears, and your personal website in one shot. It also stores all of your inventory in one central location so you can have you full quantity on every site instead of dividing inventory up between multiple marketplaces which can result in lost sales. Solid Commerce does also bring in all orders from the various sites so this integration would be great because then tracking numbers and shipping data can be updated on the orders in Solid Commerce. This would also be a great feature because then the storage locations of the different items would be brought into Shipstation to properly print pick lists based on warehouse storage location. Please vote for this idea if you would like another listing/inventory management tool that is much more affordable then Channel Advisor to be integrated with Shipstation.