I have a Kilo TT and I love it, I've only changed out the handle bars, the stock 16t cog, and pedals. I love the look of the bike, its sleek, and it does seem at least for most people I know that the fitting for the bike is 2cm shorter than on a different bike, ive ridden on a 49 before, but the kilo tt I bought was a 47 and it fits me just right. I probably should get myself fitted for a bike properly (maybe this weekend i can measure myself).
Talked to a guy at a LBS who owned a kilo tt before I decided on the purchase, and he also helped me determine which size to get.
On a side note, where are you commuting around in the bay area?