No I didn't Hugo, but I think if I do I might go in the winter when it's cheaper, (£35 as opposed to £50 in summer), and cheaper still if you book in a minimum party of four. I know it's winter now but I wasn't mentally prepared, yesterday was a fact-finding trip! There are allegedly great views on the higher sections of the run, right over to Eryri. My mate has been on the longer, higher Bethesda one and he said it was great but all over very quickly (like so many other things nowadays!).
On the way back we went up on the road behind Llan Ffestiniog and had break in a viewpoint with great views of the Moelwyns and Stwlan dam, over to the Rhinogs and right down to Portmadog, and there was a memorial to Rees Jeffreys in the car park, (see pics). I looked him up on Google and was a transport expert but I couldn't find a local connection.