Depends what type of rider you are as well. I time trial and find SS pretty easy - o/u I’m ok with - like McAdie/Fang Mountain/ Carpathian/Avalanche…but I find this session really tough as the spikes go up to 110% and stay there - even though the TSS is lower than McAdie which has more spikes - but only 105% - Warlow is really a VO2 max ride which I’m not great at - you may need to work on that as well.