#Z1 Been using Z1 for a month and love it. It has met my expectations of sound quality, usability, battery life (however little I expected :D) but what I didn't expect is the static during songs. I get used to it after a while but if the songs starts/ends quiet or I switch from a different...

Super! I tend to use only one side quite frequently unless focused on work, so this is a godsend ...and double the battery capacity, even more if you count that the other one is charging.

For the KZ Z1, when you're using only one earphone is it true mono (both channels merged) or only one of the stereo channels? Is it the same for other TWSs? :)

I'd worry more that the seller is dropshipping and you're just paying 17$ extra for nothing. I haven't had any issues with returns on either of these sites, so I wouldn't worry as much :)