This is the second one of this model that I've purchased. The first one died after it fell off my ear into an icy puddle while I was trying to get tire chains off my car. Oh, well.The sound quality is great, both at my end and for those I'm talking to. There's no problem with road noise when I use it driving -- it's now against the law to hold a cellphone to your ear while driving in Washington State. It's pretty comfortable in and on my ear and I usually have problems with in-the-ear headphones. It doesn't, however, stay on real firmly if I don't keep my head upright (hence the icy puddle problem referenced above!)I haven't had any problem with the buttons. I just turn it on or off while I'm not wearing it. The other controls are no problem to use while it's on my ear. It seems to hold a charge well -- I don't need to recharge it very frequently.All in all, I do recommend this headset.