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Used Omega for a month while searching for alternatives to the main Google Channel app. On the positive side, it is fairly straightforward and does pretty much what it says it will do—which, for the free tier, it quite a bit. If you have a small inventory without many variants, this app is a decent budget solution. It doesn't sync incorrect tax and shipping settings like the official Google Channel app, which was a huge plus. However, the functionality is hit or miss. For example, Omega was set to sync products to Google Merchant Center every week, but our products nearly expired a month later because it did not sync after the initial setup. I had to manually press the sync button. Variants kept being disapproved as well, due to how the product identifier was handled compared to other apps. Ended up switching to a different app that better met our needs.