Purchased this jacket for an intended trip to the Lake District and generally as an improved jacket for daily use. Unfourtunately the trip never came off, therefore I haven't been able to test it personally in perhaps the conditions it was built for. That said, brethability wise, it performs impeccably! Regularly wearing it on top of a suit on my commute to London, even when crammed into a sardine-like tube train it works wonders in ventilation.
Leant it to a friend for a Scotland trip... He came back, stopping off at the closest Cotswold to him and bought one for himself!
Performs great on the hills and wet weather, as well as a stylish and durable layer for wearing to the office.
Superb all round.