I bought a pair of Sidi Cobra Air boots at the 2012 WSB races at Laguna Seca. I liked 'em so much that I ordered another pair when I got back home.
So, what did I like about these boots? First of all, they fit well. The uppers are perforated which aids comfort on those long hot days. Surprisingly, they aren't too cool when the mercury drops. As a rule I don't ride in rain, but have been caught in some torrential downpours a number of times over the years. I won't say my socks always stay dry, but I suppose my 6th gen's fairing blocks most of the rain.
My pair are easy to put on and have a simple, non-fussy closure. The sole is pretty rigid, but comfy enough for short walks. Would take them hiking, tho.
The give a good feel of the shifter, like a nice pair of summer gloves do for the hand controls. My previous boots were padded numbed any feeling.
But after 75K km and 10 years the uppers are starting to break down and it is about time to retire them. Sure glad I bought that 2nd pair 'cause the Cobra isn't available anymore. Whatever the replacement I'd have to hope that I chose wisely.