Clumsy trigger, poor fit in holder detract from rating
Simple enough to install, replacing broken original. Decent water flow, no leaks. Upon turning on the Waterpik pump, I found the water sprayed all over the room until I managed to push the spring-loaded control button. The default action, without holding down the button, results in a spray. I'm used to the original sliding switch, which would stay off until you slid it on, then stay on until you slid it off. I subtracted a half point for the awkwardness of this new method. I subtracted another half point because the device fits rather loosely in the holder on the Waterpic body, a WP-660C. I'd falsely assumed that the listing in the ad of the WP-660 meant that mine would also fit.
Rating: 4 stars