I was chasing a creak from my chain ring spider on my Elilee X320 crankset and decided 140 Canadian bucks for a power meter and a replacement spider was worth the risk.
I've been using the Sino Easton meter for about 700km now. No real issues so far, other than the beta firmware completely screws up all cadence and power readings. If you did about 1000 watts it would read about 320 then drop back to zero and cadence would be stuck at zero. Rolling back the firmware fixed this. So far, seems to be accurate compared to my favero assiomas. Not the most scientific testing, but hitting the same routes and segments I often do, readings are no higher or lower than what I'd expect to see. It has also fixed the creak I was chasing for the past couple seasons. In my opinion, it's well worth it.
Looks like winspace is also selling it. If I were to guess, it probably isn't made for western markets.
https://winspace.jp/products/sino-easton-110bcd-4s