Within the past few years, a law was passed in my state that makes it illegal to hold a cell phone to your ear and talk while you're driving. Now, in order to legally use a cell phone in the car, we're required to use a headset or some other hands-free device. Since I use my cell phone almost exclusively in my car, it was very important for me to find a headset that I could use with mine.
My cell phone does not have bluetooth built-in, so wireless headphones were out of the question. Also, the headphone output from my phone is, unfortunately, very weak, so several of the headphones that I tried did not offer sufficient volume to hear who I was talking to over the road noise. I needed something that was effecient enough to produce decent volume with weak power, or something that could effectively block out a lot of the background noise, allowing me to hear the conversation easily. I found both of those in the Shure QuietSpot Inline headset.
I've had previous experience with using Shure headphones with my MP3 player, so I was already familiar with their in-the-ear style of earphones. The Shure QuietSpot headset uses the same type of foam surround on the earpiece, which when inserted into my ear, helps to block out a great deal of the background engine and road noise from my car. That, along with the decent volume that the speaker produces, helps to make sure that I can hear every conversation clearly.
The built-in inline microphone hangs on the wire unobtrusively, and picks up my voice without picking up the background noise, allowing the person on the other end of the call to hear me clearly.
The QuietSpot headset is also very durable. I'm not particularly careful with where I put my headset when I am done using it, so mine has been dropped, sat on, and tossed into the backseat of my car hundreds of times, and it still works perfectly. The wire is very flexible, yet strong, and the hook that fits over your ear is made of flexible rubber, so it is not prone to breaking. In addition, the foam surround is always in place around the earpiece, so it's almost like it has some built-in padding to help absorb any shocks or drops.
The only downside I've found with this headset is that it takes a good deal of effort to place it properly into my ear. In some cases, it requires the use of both hands, which as you can imagine, is not the most convenient (or safe) thing to do when you need your hands to drive the car. If it's not already plugged into the phone and inside my ear when I receive a call, I often find myself saying "hey, can you give me a minute to put in my ear phone?", and then needing between 10 and 30 seconds to get it ready to use. This is a fair inconvenience for both parties involved in the phone call.
All in all, this is the best headset that I've found to use in conjunction with my current phone. If my phone had a more powerful headphone output, or if my car was a little quieter, I might not have chosen this headset. With that said, though, I am very happy with the quality and durability of the Shure QuietSpot, and feel that I have gotten more than my money's worth out of it.