I had a 4 year old Marmot Precip Jacket that breathed great on 5 mile runs in the rain, but it finally began to delaminate along the seams, so I first tried to buy the new version of the Precip. What a mistake! The new version has a different coating inside and shorter pit zips. I was wet inside badly from perspiration. They don't breathe well enough for me running, so, I tried this jacket based upon the good reviews here.
The price is great. The jacket breathes better than the new version Precip, almost as well as the old version Precip. It has long pit zips and mesh lined vertical pockets in front that give added ventilation. When I have the zipper in front all the way up, it is still not breathable enough, but I keep the zipper near throat level and it breathes pretty well. I do wish the hood was removable, because I use a wide brimmed hat. Tuck the hood under, if you don't wear it, because it will fill with rain. The fabric appears durable, something that the reviews of the new Gortex Paclite does not appear to have.
All in all, for the money, lightweight, durable, reasonably breathable. I'm very happy with this purchase; and, as usual, Backcountry's prices are great, and they get the gear right out to you.