I was persuaded to buy one of these when looking for a mid-layer; the concept of over-layering was new to me and the shop assistant earned her sale with a good, clear description of the benefits. I took it up a cold, snowy and windy Kinder Scout the following day and was completely sold on it! The gilet is windproof, very water resistant (and is easily reproofed) and, most importantly, very warm for its weight.
Being able to over-layer (I currently do so over a Goretex jacket, lightweight soft shell or Paramo windproof) is fantastic. I can put it on quickly and with no fuss: whilst others have been struggling to get their outer jacket off to put on a mid-layer, I have been sitting toasty and warm.
It lives in the top of my daysack (it packs away to large doorstop sandwich size) and I would recommend it to anyone.
(Written by: gilandcoop)