I recently purchased this Ety*Com headset for use primarily in my car. I have a convertible which yields a challenging environment for headsets with wind noise plus engine and road sounds. I had tried several other wired and Bluetooth headsets (most significantly more expensive than the Etymotic) with various passive or active noice cancelling functions in order to find something that would let me both listen and be heard by my callers while driving w/ the top down.The Ety*Com yields excellent sound quality while your listening to the person on the other end. I was able to listen to the other caller w/ top down at highway speeds, even on the lowest volume setting from the handset. The speaker is of high quality and the molded tips essentially block out other external sounds from reaching that ear.The mic is also excellent, and can be used as is or in conjunction with two foam wind covers which are included with the headset. I found the best results using the large foam cover over the boom mic, if you're using it in less windy settings than a convertible you may do fine without it. I was able to carry on a conversation with the top down, no problem. At lower speeds, the other person said they couldn't tell I was in a car. At 75-80mph they could hear some noise in the background, but had no difficulty in hearing me speak.It's worth noting that some may find the earpiece uncomfortable as it's inserted into your ear similar to a foam ear plug. The earpiece is identical to other Etymotic head phones if you're familiar w/ those, and it comes with various sized tips so you should be able to find one that fits your ear shape. I have a pair of ER-6's so I was used to the earpiece, and I like the fact that there are no over ear loops or things which make it difficult to wear the headset w/ sunglasses or a hat. Only downside is that the insertion technique usually requires two hands, so this is not a headset that you might fish out of the glovebox and pop in your hear within the timespan of 2-3 rings.It would be nice to have a mute and/or volume control on the cord, but that's about the only complaint I have. Excellent headset, after much searching I've found the perfect one for me.