They aren't bad but I prefer the Tennmak Pianos
where from fella, aliexpress?I snagged a pair of these on your recommendation and I love them to bits. Better than my VS3DS and Xaoimi dual drivers and miles better than Soundmagic E10s.
Don't be afraid of Chinese IEMs. I'm amazed with the KZ KST and how it compares to my expensive Shures! They have detachable 2 pin cables as well! These are around £18 on the rainforest if you don't want to wait for delivery from China.
A lot of them use knock off variants of the Yuin Pk3 or Pk1 drivers which generally seems to be regarded as surprisingly close to the original driver.