I followed the size chart given and decided not to size up as I usually would and it fitted me perfectly. The leggings are a bit long but I could hide the folds under the boots (for reference I’m about 151cm and I took size S).
When I had a shoot with more dynamic poses, the jacket kept unbuttoning so it was a bit annoying, I’d recommend pinning it down to secure it. Do note that it can get quite hot if you’re outdoors with no AC. Overall, I’m satisfied with the cos :)