Absolutely love this top - both the colour and fit - and would wear it constantly if I could get away with it! It's just so light and remarkably warm to wear.
I would say I'm between a size 12 and 14 which is not always a good combination for Rab clothing, but the 12 fits me well and is amply long enough at the back to cover down well over my waistline. Generally I have trouble getting sleeves long enough, however, again these fit me perfectly in length and width.
It washes up well and dries quickly too do ideal if toy are backpacking or travelling light.
All round a good top and if I could afford it I'd have two of them. Possibly that's the only down-side as it is on the expensive side - if you have to buy it full price; luckily I got it on an extra discount day.