The new XF (for EXtended Fitness) style of Skechers is a wonderful addition to their product line.  They are intended for longer periods of wear than the original Shape ups.  I have the original Shape-ups (Action Packed) and love them for their comfort.  However, the originals are not intended for all day wear and I need a shoe I can wear all day at my work where I am on concrete or hard tile floors most all day.  The Superstep XF has a lower profile sole and provides more stability yet also has the magnificent inner foam that feels so cushiony.  I suffer from plantar fasciitis and I have felt a great deal of relief when wearing the Shape-up originals and now this XF Superstep.  For sandals, I rely on Fitflop Oasis thongs and their Roma sandal but for shoes, these Skechers cannot be beat!  Let me add that the Superstep is a nice clean white with silver accents and it looks understated and classy.  My standard size fits perfectly.  I know some people complain that they run narrow or small but my feet are borderline wide and these regular widths fit great for me.  Length is perfect too.  I am so glad I bought them!