I wouldn’t say they’re brutal in terms of steepness or mandatory drops, but they are quite rough and technical, and the amount of vertical you cover in a day means wear on bike and body accumulates quickly. I just did three days of uplift and I’d say that’s equivalent to about a year of riding when I lived in the UK. They are all really fun tracks though. Take spare brake pads, go tubeless if you can, and make sure every bolt and spoke on the bike is still tight every day.
The XC-only tracks closer to the sea get less traffic so aren’t as rough. Make sure you’re not pedaling up to access tracks you can get to with the uplift vans though, as that’s a bit pointless imo even though plenty seem to do it.