Mine is the standard variant with no humidistat. For its size it is more effective in terms of airflow than larger fans and is genuinely close to silent with a pitch of noise that is not irritating.

I previously had issues with resonance in an adjacent wall cavity from a "silent" fan installed of comparable CFM capacity and this fan has no such issue. Ability to connect ducting is also very helpful.

Construction seems to be very good with well formed fan blades and packaging to prevent imbalance in the impellor. Motor appears sealed which somewhat confirms the claims for moisture rating.

An additional advantage is that this is much smaller than a traditional bathroom exhaust fan and could mount on a wall or ceiling with decent aesthetic and function.

Very happy with the purchase.