Yes, very quiet and efficient, but not so easy to install without attic access. However, I found a way by removing just one screw to gain better access to the fan interior, and drilling two new holes to secure to the ceiling truss.

This works good, but installing the grill can be a challenge, especially if you have thick sheet rock from the 1960s. I wish I would have bought a higher CFM model.

It is amazing just how quiet this fan really is! We are amazed! We bought this to replace a non-working fan in the bathroom of the house we just bought. We did hire a professional to install it, since there were some issues with the wall switches and we wanted to get them all checked out. He didn't seem to have any problem installing it except with the enlarging the hole in the ceiling to install it. Cutting out sheetrock overhead is a very messy job!

Because of the way the output duct connector attaches, you MUST have access to the space above/behind it., because it's impossible to just slide the unit into place through a correctly sized hole when this is attached. This is unfortunate because if it slid into place like some others this would be a very easy install from the front.

This went into a small bathroom, roughly 5x10, where nominally a 50cfm unit would be sufficient; however, because there's no air gap under the door, i wanted a fan strong enough to pull air into the room through the only other route when the window's closed: the 5" furnace duct on the floor. That's a long trip for air to make from other rooms in the house, so I figured the extra oomph of a 90cfm fan would be helpful.

In practice this was a good decision, the fan is very effective with the door closed without ever being too much. If the fan is on while showering, the room never gets humid and the mirrors never fog. If you wait and turn it on afterward, it takes maybe 5 to 7 minutes to fully clear the room of humidity and defog the mirrors.

I don't know what 0.8 Sones is supposed to sound like, but it's pleasant enough in real life: there is absolutely no motor sound whatsoever, just a low, steady whoosh of air. Before installing I bench-tested it in the room by just running wires to an outlet, it and it was *extremely* quiet and clearly moved plenty of air. Once installed, the air resistance and slight back pressure of the ducting and the output vent cap I used increased the air noise somewhat, but it's still a rather pleasant, reassuring white-noise sound, and still not loud at all.

Easy to install. Very quiet fan.
*Note* the suggested duct and vent of 4" which is wrong. It should be 6". I ended purchasing the wrong size.