I use this jacket often for things like running and rowing crew. It is incredibly breathable and really lightweight.I'm 6'2" 185 and the medium size fits perfectly. I like how the back is longer than the front.
However, this jacket is pretty no-frills. There are no pockets aside from the arm pocket (which isn't big enough for an ipod touch). There is no drawcord around the hem, no hood, nothing but stretchy material around the cuffs.
However, the jacket looks fantastic. I feel great running in it. Fits like a glove and I've gotten more compliments on this in the last few weeks than on my Alpha SV, Venta AR, and Theta AR combined. So far no water has gotten through it, but I've only worn it in fairly light drizzle. The water beads off of it pretty well, but it is nothing close to waterproof I'm sure.
The thing about this jacket is that it is geared for pretty specific stuff. If you can justify to yourself buying a jacket that is not waterproof, has no pockets, but breathes great and fits perfectly, go for it!
I have about nine jackets; everything from an ultralight Marmot Mica rain jacket, to an Arc'teryx Alpha SV ice climbing/storm jacket, to a Mountain Hardware Subzero SL jacket for bitter cold and this Accelero jacket is easily my favorite overall, even if it's not my most practical or expensive jacket.