I chose the pink/black ones, for reference...

The fit and comfort of the shoe- just about perfect. I wear a 10.5 wide and New Balance is one of the rare shoes that can accommodate me. They are both sturdy and light, a combination that baffles me, but I appreciate it nonetheless. The tread is sturdy enough to take some light hikes but not clunky, so they work in an aerobics class or on the treadmill, as well. If you are looking for an all-around comfortable shoe that fits all sorts of activities, I don't think you can do much better than the 870.

BUT.... The shoe I got is BRIGHT.  I thought it would be bright in the fuchsia, breast-cancer awareness pink that is so popular. That color is in the shoe, but it's in the trim. The main pink, part of the shoe is more of an orangey pink. Just enough difference to make the shoes go from "look, I have sassy shoes!" To "LOOK, MY SHOES ARE REALLY BRIGHT!!!" I don't know if I care too much, but it is taking some getting used to. It's a nice change from my usual boring colors, but I'm glad I also got some more subdued shoes for those days when I don't feel like "look at me!"