Works very well and I have not blown out any air during use. The screen could be a little easier to read. This is an inverted LCD with a greenish backlight. There's an odd lens magnification/distortion, and the LCD is far from perfect. You can see it right in the picture. This is normal, but I see it as a problem in the wrong lighting conditions. An Indiglo style LCD would have been better. A backlight and valve light would be handy if I ever need to use this at night, but I'm unlikely to need…