Works well on the base edge but when using on the side edge, tool has a tendency to swivel and also gets obstructed by the brakes. Not totally sure if I can rely on this for the side edge bevel. At the moment, I'm using it intermittently to keep the edges in check but would still refer to a shop after every 5-6 trips to the mountain for edge sharpening.
I purchased two of these edge tuners since they are inexpensive, well built, durable and easy to use. I had previously used a swix edge tuner which was smaller, more expensive, less durable and less accurate. I like this edge tuner better since the file is longer and the tuner body is more rigid and solid which makes it more accurate when tuning edges. I tune my ski edges regularly after every couple of waxings as I wax, tune and do small base repairs on my skis. I use a light touch often as I tend to avoid rocks on the slopes.
good how to use your tool tutorial