I have used it for 1 week and the good thing is that the battery charge is maintained without having to remove it from its inner case. I bought the battery here in Peru for around 1.4 dollars, Although this control does not seem to have time to focus, in most shots these are sharp. The most effective option is the 2-second count. There are other more complete controls, which give you the option of more shots, or controls that adapt to these or other cameras from other brands that do not have an infrared focus, these can work with YouPro, but remember to remove the 3A batteries after use them because continue consuming them. Finally take into account that these last controls (youPro, Viltrox, Godox etc) with the use of the flash in several consecutive shots can damage the camera if you use it too frequently.
It works perfect! Quality as described.