I own these shoes in both colors and they are great at the gym!  The red is a bit more conservative looking while the blue has a little more silver than I would ordinarily wear but very comfortable, nonetheless.  It has an R3L last which renders a wider toe box for greater comfort at the gym.
I was hoping to find the black but it was only made in limited quantity.
This model will be replaced by the WX710BK, I look forward to trying it out!