I have used these a few times now, so worth an update. They are very comfortable, have done 50 mile warm gravel rides and they feel as good as my Rapha cargo ones. The baggy shorts are very light and short and tbh not much of a benefit as far as I can see. I guess aesthetically they look better.
I think they are a premium product and perhaps worth the money, but only perhaps. I have a couple of pairs of Rapha cargo, and a couple of pairs of Rapha cargo liners. The GRVL ones are similar to both, the benefit they bring is that if you are wanting a baggy overshort they are definitely better than a traditional baggy that may need hiking up at the waist every so often.
I do quite fancy their merino mix jersey, but not at £120.. 🙄