My spouse and I did the Snaefelsness tour as a small group (two couples) in late February. It was quite frankly awesome! Ori was a wonderful guide, and we were just repeatedly awestruck by the sights to which he led us. Even in winter, hurricane-force winds and all, we would repeat this in a heart-beat!
We did other tours too, but this one stood out for being super-accommodating of individual interests, and for the overall comfort. Highly recommended!