My club has purchased one for full members to borrow. It’s a smidgen faffy, but has helped me tune my forks to a tune I think is perfect for me, that particular bike and the terrain. It suggested 5% here, 2 clicks there and a token or 2, and the fork, from feeling ‘ok’ now feels bl00dy fantastic!
Now need more setup sessions for the shock.
So it’s worked for me, but don’t expect a quick tune up – and don’t use it when riding with your mates, as they’ll get fed up of waiting while you calibrate, adjust etc. and just bugger off and leave you!! Best to set a couple of hours aside and either ride solo, or have someone along that’s very patient.