The Supplement Shop
The app itself has terrible connections with some of the marketplaces and returns a lot of errors. The most problematic are failing to send an order from a marketplace to your Shopify store (which happens a lot) and occasionally failing to send tracking details to the marketplace after you've sent an order. We still use the app because they are the only ones that are in the marketplaces we use but we are definitely looking for alternatives. Support is ok, they will give you an answer fairly quickly but will never take responsibility for the issues on the app and have no interest in fixing them or making any further developments to make it a long term sustainable app. We use eBays official Shopify integration (which is free and never ahs issues) but need to use Omnivore for Kogan & Catch (for now).
Very slow response, given the amount of money I have paid for monthly subscription USD 75, I have to wait for more than 24 hours to get a repsonse back (email). Cannot even dial-in to reach out to a real-person technical support, the contact number is always on voicemail