My bubble counter cracked and leaked after about a week. I cant believe that cheesy thing sells for over $30.
Also, I found the regulator was set to far to high of pressure out of the box making it next to impossible to set the needle valve with any accuracy. So be ready to adjust the regulator to decrease to pressure setting.
Before I cranked the pressure down, the tubing was always blowing off that blue backflow preventer pictured with the bubble counter.
The diffuser did a poor job of making teeny bubbles too, though mine came with a different diffuser than pictured. So after about 2 years of use, the only pieces that I'm still using are the regulator, the solenoid, and the needle valve, everything else was a waste of money.