I purchased the ASICS Women's Nimbus 16 in a size 8 a few months ago and loved the pair I received.  They were well padded and extremely comfortable.  Just a dink bigger than I like when I sprint, so I ordered the same shoe (or so I thought) in a size 7.5.  I decided to go with the lavender stripes instead of the same blue/aqua/turquoise one I had.  The new lavender/aqua pair are not as cushioned in the sole as the size 8 ones I have and the material feels and looks cheap.  I really loved my first pair, but was a bit disappointed with my second.  They were not the same quality.