I travel every week and have gone through dozens of headsets from every manufacturer. I find that either the first person I call asks me to get off the headset because the quality is so bad or it works well for a few weeks and then breaks. I actually traveled with a full Plantronics headset in my bag which made me look like a secretary that is on his lunch break and forgot to take off his headset.One of my customers turned me onto the Etymotic Research 4P for my Ipod and while I was ordering it I found the cellular headset. I figured that if this was half the quality of their music headphones then it was worth the money.First you will figure out which earpiece fits best and then you will get used to pulling on your ear while you insert the headset to get the best seal. Make sure you moisten the headset tip before you stick it in your ear. OK, I know that this is the gross but it will be worth it in a minute. The headset feels a bit wobbly in your ear but it is fine.Now the best part. The quality is perfect!!! I get comments such as "I can't tell you aren't on your landline." Also, I can hear the conversation perfectly since the sound is barrelling down my ear. I usually have the volume turned up all the way but I don't have too on this headset.Again, the quality is great. You can tell that it is made with high quality and I will lose it well before it breaks. It has a nice carrying case so I don't have to have a jumble of wires in my computer case.Enjoy!