Review on GIYO Mini Bike Pump with Pressure Gauge & Repair Kit - Portable Compact Bicycle Pump for Road, Mountain & BMX Cycling - Presta & Schrader Compatible - 120 PSI by Anthony Hales

Pump works well I think, not sure. The tire seems fuller, but the pressure gauge doesn't work at all. That's the main reason I got it. Although it's small, it's very convenient. Edit :: It turns out I'm very weak or the pump wasn't turned on properly. Pressing on the hole above the valve should create a better pumping seal and then the gauge will work. Definitely a job, but it's so small and portable that I almost don't mind, don't do it too often anyway.