Our transfer on 23 August took just over 2 hours, with 3 drops in Sidari, 2 in San Steph, and one in Arillas (us).
Going back yesterday, much better, with all pick ups in Arillas (2) and San Stephano (2), an empty coach almost. There was a full coach from Sidari though! Transfer took about an hour and a half - coach was driving carefully, with the rain on the road, it was a little slippy.
I would say enjoy the ride and save your 50 euros for a lovely meal at Brouklis!
Sharon