“I've tried Watts, coin vents, some other generic type, but this one has been the best. The knob on top feels functional, like a small turn does make a difference. On air vents like Watts, there's a lot of play in the knob and you don't get a good feel of how open it is. Also, with Watts I've had water leaking out, and have never had that with Taco. I can't see myself buying any other vents than these. I took a star off because it was packaged horribly and arrived pretty crushed. My understanding is that the inner components, although not fragile, shouldn't be carelessly abused. There was no care in packaging at all. The Taco packaging was placed in an envelope when it absolutely needs a box for protection.”