"I had used Jaybird Bluebuds X Bluetooth Earbuds to listen to audiobooks for perhaps 2 years when I heard about Terrano-X. I decided to try them because I wanted to be able to take phone calls without stopping to dig out my phone, and because the Bluebuds made it hard to hear cars.I really liked the concepts behind Terrano-X, but wasn't sure about wind noise, hearing cars, etc. After the first ride I was disappointed and thought I'd wasted money and time with them. But instead of writing a bad review to vent my frustration, I kept riding and now I choose them on almost all rides over the Bluebuds.The main thing that bothered me is I couldn't hear my book going downhill. Too much wind noise. But two things happened: (1) I got better at adjusting the speakers. In the beginning I guess I made them too parallel to the direction of the road and now I turn them in a little, which seems to cut down the rumble; (2) I slowed down my descents to maybe 30 mph tops. I didn't like that at first, but now I think about it positively as a safety feature. I almost hit a deer the other day and thought "yeah, maybe where I ride 30 is fast enough."They are more comfortable than earbuds and I do hear the cars better.One thing I don't like is for some reason with my iPhone the book will pause on its own. Very frustrating. Happens once every few rides. Then I have to stop, dig my phone out, and press play."