I tried on this jacket at a local running store, and was so hooked that I seriously considered buying it in a color that looks terrible on me.  It was that amazing.  I'm glad I looked it up and found it on Amazon, where I found the perfect color for me (turquoise with black accents and silver reflective piping).

What makes it so great? Well, first it just looks amazing.  It has a very flattering fit (even for someone plus-size like me - which is nearly impossible for sports gear!), and the design and piping looks really nice - a good casual jacket to wear around. It looks high-end (which it is).

Its silver reflective piping makes it a good choice for cold weather night-time fitness (and when it's cold, usually it gets dark sooner outside, so that's a good thing to have).

It's wind resistant, which I discovered is the key for staying warm when biking or running in cold weather - I had thought it was all about wearing lots of warm stuff (sweats, fleece, etc) but the wind cuts right through and robs you of warmth - I learned that wind resistant is the way to go.  I used this, a light hoodie, and a wicking t-shirt (and pants of course) as my winter running gear, and it was perfect.

The best part about this jacket is that it has detachable sleeves, and a big zippable pocket at your back to stuff the sleeves into as you get into your workout and it gets a little too warm for comfort.  The sleeves (well, it's like a bolero - the sleeves are attached to the shoulders, along with a "yoke" along the back of the collar) are attached with magnets, rather than a zipper like I've seen elsewhere.  I know, it's silly to consider a zipper to be too inconvenient, and take too long to remove, but when you're in mid-stride on a street at night, that's really not the time to be messing with a zipper.  Instead, you pull your hand into the sleeves, tug down, and they just pops right off of the other magnet, then you stuff them into the back pocket. Easy peasy, takes maybe 1.5 seconds.

So then you're running in just a vest, which keeps your core warm but lets you breathe.  If that's still too warm, you just unzip the center zipper, and you're good to go.  So this is a two-in-one garment: wind-resistant jacket, and wind-resistant vest.  Score!

Has 2 zip-up pockets.  No real good place to put an iPod, but I dropped it into the unofficial "pocket" on the inside, from where the pockets are stitched into place, worked fine for me.

This is not lined (I think that's good - it'd get too hot if it were).