I've never done one actually so to some extent I'm speaking out my ass. Honestly, just reading on FB what I see guys doing I'm not sure I see the value of doing a week that is all outlier stuff. I see crit guys doing 5 hour rides with 8-10k in vertical. For 4x45min races over two days each weekend? Seems like it's working a lot of the wrong stuff to me. If I were a stage race guy doing P,1,2 stuff I could see doing a 32 hour week in the mountains. Maybe a bit less if I were a masters stage race guy. But I see guys who might do a handful of 60 mile road races, a bunch a circuit races and crits doing stuff that doesn't seem to make a lot of sense to me.