Rating: 4 / 5
The newer incarnation of the Dyno is a medium weight (my one in medium comes in at 350g) hooded jacket in pertex equilibrium. Equilibrium is a dernier gradient fabric which apparently assists in transporting moisture from the inside to the out, which combined with its high breathability and slight wind permeability ensure that you stay pretty comfy inside. It has a good DWR treatment that happily shrugs off light rain and snow.
I've been wearing mine most days over the winter, sometimes over a 200wt fleece, sometimes just over a short sleeved tshirt, during gentle walks, cycling and more demanding hiking. I prefer it to a lighter pertex windshirt as it feels nicer (and noticably less chilling in a breeze) against bare skin, fends off the rain better and feels much nicer when wet. The hood is substantial; not helmet-sized, but it has a wire stiffened peak which I find quite useful in poor conditions, something which lighter shells seldom have.
The waistline feels like it is cut quite high which might benefit climbers (though I prefer slightly more coverage), and the pockets are high; clear of rucksack waist belts.
One small secondary benefit is that the jacket has quite a non-outdoorsy look at the fabric is not at all crisp-packet like, so its quite unobtrusive when off the hill.
Equilibrium is a non stretch fabric, and as a result of the Dyno's fit I cannot roll the sleeves up over my elbows, something that would have made this jacket significantly more useful in hot weather. In strong winds, its wind permeability becomes increasingly obvious, requiring the addition of an extra shell layer.
It isn't perfect, but I rate the Dyno highly and I'm definitely going to be getting a second Equilibrium jacket, but whether this will be the Dyno or the Rab Alpine remains to be seen.