I bought a pair of Kooka spikes when i was in india a few years ago with a whole stack of SG gear (still only using the thigh pad combo... after completely relaxing the fabric covering).
I swapped them out for New Balance 4030's (Blue version) after only 1/2 a season. I felt i didn't get very good stability running between the wickets, more so the turning in and out of the crease than straight line running.
That said, i did take the spikes out and have been using them for indoor nets every week since....