Omar Muhyarwrote a review of PNW Components Rainier Dropper Seatpost - Internal Routing on September 11, 2017
Familiarity: I've put it through the wringer
This is one of the best droppers on the market if you're seeking a smooth, simple option that's free of the gimmicky BS and reliable as hell. Installed this past June and haven't had a single problem after 40 rides or so. The lever is simple to actuate, resulting in smooth drops and quick returns back to its upright saddle position. I'm running it with an archaic 2x drivetrain (still like my granny gear!), and the lever doesn't crowd the bars too badly.
You can't adjust its return speed, but it's a perfect return that's neither too fast, nor overly slow and sluggish. I find it doesn't punch my undercarriage like some others with faster returns (cough, cough Reverb). Also, I haven't experienced any side-to-side play, which is a nice departure from some of the other big names in the field.