Hey Eric, I recently acquired butterfly varios for my ASH25. I immediately liked it better than my SN10's vario, and having flown the 302 a bunch in a Duo Discus I would put Cambridge in third place. I can't comment on the ClearNav . The audio is the most pleasant i've heard and the display is bright and delightful to view. I think it is equal to, if not better, than the high end Sage, and much more visible. I am still trouble shooting the more sophisticated features of the instrument. The artificial horizon is cool even if never used, and it doubles as a nice navigation, and final glide device. As far as the cruise control feature, at this point it seems like too much information to me. I just fly fast if the next thermal looks good, and slow if there might be trouble ahead, making some modest changes to accommodate en route sustained lift or sink. That horizontal gust thing might actually work, as it seems easier to center thermals with the Butterfly, although I might be inclined to say that about any variometer that cost as much as my first glider. As of now I think it might be a better mousetrap, and if you are interested come down and fly with me and check it out.

Dale