I am new to the exercise world, walking no..but in my older age (39)I have to up it a notch and begin jogging/running.  I have the stamina but never the shoe of late.  I had the same pair of NIKE shoes for 13 years for exercising.  All these great new types of shoes have come out the last year or so but soooo expensive!  In any case, fell upon them on Amazon and for much cheaper!  When I saw the commerical I really had the yearn for them.  I tried the shape ups from Reebok etc..threw out or gave away.  I love these shoes and am so happy I went out on a limb.  While standing it feels like your on a trampoline, and to jog..they are really wonderful and comfortable.  My knees aren't the best so it has the comfort spring gentle on your limbs.  And good for those like me with a nice arch. As far as reading the other reviews on the size.  I did take the advice on ordering a half size up.  I normally wear a 7-1/2 wide and with dress shoes etc..normally wear a size 8 simply because I have wide feet.  So I got the 8..I have an inch of space almost..however...they ARE narrow and snug..so I'm glad I got the 8 and I simply just losened the shoe strings and I was fine.  BUY THESE SHOES!