When I received mine there was some condensation in the unit. Called customer service, they said that all units are tested before being sent out. I figured that was the case, but I just wanted to be sure. It arrived on time perfectly packaged. The first time I used it was a little tricky, just make sure to follow the instructions and give it a chance to heat up before trying to apply steam. It's a life saver. I've had it operational for a couple weeks now. I LOVE IT. So far. I plan to only use deionized water in it. Which IS NOT distilled water. It is more expensive and harder to find (psst: bissell sells that too) than distilled, but does not contain the heavy particulates that could be in distilled. My microwave and stove have never been easier to clean. My floors sparkle. Occasionally, I need to go back with a rag to wipe up some excess water; it's still less than what I was left to clean up after my old mop.