I love these shoes so much, that this is my fourth pair!  (I always keep a new one for backup, in case they stop making this style).  They really put alot of bounce in my step, and the shape of the sole really helps me maintain good balance.  I can actually feel it strengthening my core muscles.  As is true for me with all athletic shoes, I take a 1/2 size larger than my usual shoe size, and the fit is perfect.  Many people have complained that these shoes are dangerous and horror stories are all over the internet about damaged knees, and broken ankles, etc. from falls in the shoes.  I can only say that they are meant  to always keep you a bit "off balance" to strengthen your muscles and provide fitness benefits.  If you're clumsy or not willing to pay attention to what you're doing, they may not be for you.

One other thing that I've noticed about Skechers Shape Ups is that they tend to allow your feet to pronate (turn inward).  So if you have a problem with over-pronation, these may not be for you, though my Dad's wife overpronates and she loves them.  Wear them in the house first to see how they are for you.  Now, I supinate (means my feet roll outward) so these actually correct my gait!  No other shoe I've ever tried does that for me, so if you have the same issue, you also may love all the Shape Up styles.

This style, the XF, also has a lower platform that some of the other styles, which makes them better for all day wear.  The upper is kind of a faux suede, holds up pretty well, color (stone) goes with everything. They are hard to clean, so I spray them with a waterproof stain resist spray, and that helps a little.  I wear them to work every day, which involves lots of walking on concrete.  Legs and feet feel great at the end of the day.