The last one of these 5D6700 humidifiers I had worked 5 seasons with nothing more than putting in a dash of bacteriostat treatment every time I filled up the water, replacing the filters twice a year, and putting a drop of 3-in-1 oil in the motor bearing every once in a while. I was really happy with it, despite having to spend $25 a year on filters and bacteriostat. Late last spring, it finally gave up the ghost, so I just bought another one this fall. The new one has: Better control over humidity (5% increments instead of 20% like the old one). Better sensitivity -- the humidistat is now in the cord assembly, instead of inside the enclosure. It's much better at sensing changes in humidity (like when the forced air heat goes on). Worse reliability. The 4-speed motor control on the fan died after a week of use. Now the humidistat still controls humidity, but it's either off or full speed power on (makes some difference to me if it's loud, might matter a lot to many). Since it's winter and I need it, I decided to just let it go rather than try for a replacement or repair. Worse value -- the Model 1050 inlet air filter which keeps the water from getting full of dust and crud used to be included, but is now an optional extra -- would have been nice if I'd known ahead of time, instead of finding out when I opened the box. Annoying. Just charge an extra few bucks, and give us something you can use properly right away. I'm hoping this one lasts as long as the last one. Somehow, though, I don't think it will.