Do you have any advice for potential travellers?
Me and my wife consider ourselves fit, we practice and compete in cycling and rowing, occasionally do running, yoga and go the the gym. Despite that we felt our muscles sore on the first 2-3 days. We are 35,39 years and the rest of the group were either our age or older (someone was was over 70), but we all did well even if it was a bit demanding for some people. I forgot to mention we did the grade 1 vacation, although I am always looking for more and wanted skip it and start with grade 2. At the end it was not that bad, one day we started a bit earlier than the rest and added few more kilometers, other days we were hanging at the back of the group and we were running back and forth adding even more distance.
The equipment is important, usually your ski/snowboard trousers and jackets will be too warm for this specific activity. As others previously pointed you usually need few layers of clothing, base layer, then long sleeves shirt, softshell jacket. I also had a (sleeveless) gilet in my backpack to either use instead of the softshell or under it and I never felt too warm or cold.
One guy decided it was not his type of activity because he had problems with his balance on the downhill sections which in my opinion were not so long, fast or scary, but everyone should consider it for themselves. As I said the rest of the group did just fine. There was enough to explore by walk in the area and it felt like he did fine.
A very good point to choose this vacation is that almost every day we were skiing in different location. It probably depends on the snow conditions, but it actually adds a lot and it's not boring as doing loops on the same tracks every day.
We found the hotel very good. I did not see the rest of the rooms, but we were in a double room and it was big. The rooms and the restaurant part were well warmed and it felt good only wearing a t-shirt.
There was Internet connectivity in the hotel and we had no major problems, it took sometime to connect, but then it worked well.