I took the Marathon Winters off the bike last night.
I miss the reassuring buzz and awesome grip, but the speed difference last night was astounding. I "scalped" everyone I saw and the bike felt as though I'd cut the brake lines. I hadn't reaslied how much I'd come to rely on the drag of the tyres for deceleration. As a result, I spent a lot of time clicking up through the gears and then standing on the brakes.
It was enormous fun.
However, I can't fault the Marathon Winters - totally Ronseal.