Tx/Rx antenna from myrcmart - mushrooms review

Today I received package from myrcmart with antennas cover leaf (sometimes people call them mushrooms)  for transmitter and receiver with right angle SMA connector.

First impression was good but is only first when it still in plastic bag ...

They are made it really fast - even not heat the shrink tube

The next step is opening "mushroom" and see  oxidation of copper (normal for copper but it should be protected against) 

And another is askew soldered ...

I will update after SWR measuring