This is my second stages power meter. I have a 105 for my road bike, and when I purchased a gravel bike with GRX components I was pleased to see this was an option. I had the bike shop install this arm for me, but the one on my road bike only took a few minutes to install. It is also easy and quick to connect to your phone or head unit. I couldn't be happier with the product.
Overall a pretty good power meter option for Shimano cranks. Installed this on my gravel bike with GRX810 drivetrain. Seems pretty accurate and it was easy to install. My only wish is that they offered shorter crank arm options (but that's up to Shimano as well, at least for the GRX810 crankset).
Got this for my Canyon Grizl, totally unnecessary for someone of my 'abilities' but fun and should help with training etc. Using this on the rx600 grx crankset, installation was easy. Works well so far. Survived a very wet gravel race without issue.
