Bests & Worsts Reviews from Amazon

Well, this was great while it worked. When it didn't work, it nearly killed me. About the third, maybe fourth time ever using it, I filled it with water and plugged it in. Pressed the power button on the side and BAM! It shot off the unit, felt a pretty strong shock, there was a visible blue spark, and it flipped the breaker in my house. The button is blackened inside, and there is a little black mark on the outlet where it was plugged in. Nothing else but a TV is on that circuit, by the way, and the house is only a few years old. Upon closer inspect, this little power switch is fragile and cheap - not really appropriate for a tool like this. How would it stand up to use in the garage or tool shed, or in the driveway? All I was doing with it was the grout in kitchen floor tiles. Will be figuring out what my options are for a refund.