Well, starting off 50Lbs heavier than I am today, I originally purchased the Asics Nimbus 10. These we're great for what I needed at the time as they we're reviewed as a great shoe for heavier runners and they we're right. Now, as my Nimbus begin to age, I started looking for something a little more versatile. I never tried on the Kayano 15 up until 1 week ago, I also tried the Nimbus 11's, they we're like apples to oranges, as soon as my foot slid in the the Kayanos, it was like I had on down pillows and not runners, even compared to the Nimbus 11, these were much more comfortable and a nice snug fit off the bat.
So, here was the real test, I put them on yesterday and took a little 5 mile run... wow. They we're very stable, plush, yet firm and of course, there doesn't seem to be a break in time, at least not for me, I can only assume they will become more comfortable as they conform to my foot shape also.
I have to tell you, I was hesitant to spend the $130+ on a new show after shelling out $120+ the year earlier, but, honestly, I don't regret it, and I don't think others would either. I noticed other reviews we're basically all positive, so, we can't all be wrong.
Good running!
Just as a side note: I chose the Gel runners over the air and springs that Nike have as I have destroyed the springs and popped the air. (3 nikes in 1 year)
I still like the Nikes, but they are just not for me.