With an enormous 60,000 g/m2/24hr breathability claimed for their 3-layer Exoshell60 fabric used in the MT500, Endura have instantly blown most other jackets out the water on paper, never mind the competition below £180. They haven't relied on this completely for moisture removal, instead fitting the MT500 out with plenty of vents such as the huge pit zips dropping from below the arm to the waist. This, together with an adjustable hem, collar and cuffs helps with airflow.
On paper all this is pointing towards some excellent performance, and in the real world we have found it to bear out - it is a jacket that is simply very comfortable to wear all day. We love the cut and coverage on the bike and, together with a very durable construction and excellent over-helmet hood with plenty of adjustment, we regularly find ourselves just pulling it on at the start of a ride and not removing it until back in the door. Just as well as it is relatively bulky for packing, so probably not a jacket to carry in the bag purely for emergencies.
The only feature we aren't 100% sold on is the internal lycra cuff that can soak water up and tends to stay wet long after the rest of the jacket has dried. It also prevents airflow up the arm even when the cuff is opened up to allow a draught up to prevent moisture build up. They are a relatively minor issue however, and you can always cut them out yourself if mortally offended by their existence.
The rest of the jacket is a joy to wear in grim weather, with the adjustable entry points good for snugging up against the elements and a fabric thick enough to shrug winter off without compromising breathability and wearability. It really is one to reach for when the conditions turn bad.