Sonoff vs no name brand

Hi all, bought this from ebay and its all working: DC 7-32V 2/4Channel Smart Switch WiFi Wireless Relay Module Home Remote Control | eBay

But it hasn’t been without its problems the main one being that it interferes with operating my roller shutter with my phone, anyone had experience with both and could tell me if the Sonoff is better or is it just the same thing in a pretty box?

Sonoff should have better quality than the bare board.

Could you tell us more about the interference?