Specifically regarding your seat.
Looks like you are using a seat with round alloy rails.
The clamp is designed for oval rails.
The paint jobs are not the best - same with mine. Paint got into bolt holes, causing some irritation.
Minor voids on mine, but not concerned.
Boroscope in the down and top tubes were super clean for me, as expected with EPS
For the price they are awesome. However, for the price you can expect to put in some sweat equity.
I mean though, for any small issues I’d still buy from them again