Pros: Lightweight, Good Sound, Clear Signal Cons: Bulky Other thoughts: I made it work in my car to turn any head phones into a mic enabled pair. Love it!

Pros: Connects Easily, Clear Signal, Good Sound Cons: Bulky Other thoughts: I am using a set of noise cancelling over-the-ear headphones with my iPhone to listen to music. If someone called while I was wearing the headphones I would have to take the headphones off my head and unplug them from the phone in order to take the call. With this microphone headphone adapter I no longer have to do that and its nice that I can answer the phone or hang up the call using the button on the microphone adapter (it works just like the Apple headphones).

Pros: Connects Easily Cons: Bulky Other thoughts: It says ipod/iphone compatible, which it is, in the fact that it works when plugged into an ipod/iphone; however it doesn't provide all the functionality that the OEM ipod headphones afford. it has a single button on the in-line controller that allows you to stop and start the music, press it twice to skip forward, three times to skip backward, but it does not have volume controls that come standard on the OEM headphones. If you want to adjust the volume you have to pull the phone out and do it manually, which can be a pain when riding a bike/motorcycle or working out. Also, between the adapter and the shichever headphones you plug into it there's too much cable and it makes it seem 'bulky'

Pros: Good Sound, Connects Easily, Lightweight Cons: Other thoughts: Much improved over the sound from built in speaker and mic. Being able to add a mic to my favorite earphones is great. Much more comfortable than clip on blue tooth and has better signal since it's wired too. Clips easily to my shirt collar. Seems to be made very well.

Pros: Cons: Other thoughts: This is a cheap way to add telephonic abilities to a set of earbuds you already own. The downside for me was that adding a third cord and an extra jack to my system made cord management that much more unwieldy. Wrapping up the earbuds when not in use was awkward because of the sizeable jack on this device, and the microphone piece also interfered with spooling up the cords. All of this made for a tangled mess when it came time to unwrap and use the earbuds. Minor complaint: when using them at the gym, the only convenient place to hook the microphone was on the collar of my T-shirt. Frankly it did not do a very good job of picking up my voice in that location. However, callers said the sound on their end was still much better compared to when I was using my Motorola S305 bluetooth headset. That headset, which admittedly does not have any special noise-cancellation features that I can detect, seems to amplify the already-loud background music playing on the gym PA system, which my callers always hated.

Pros: Connects Easily, Clear Signal Cons: Other thoughts: Works like it should. Can't really tell if it degrades sound any as I haven't used it for music yet, mostly to talk to friend since it's clearer than listening through the phone itself. Seems to be much better than the cheap [...] adapters that fall apart after a short while of LIGHT usage.

Pros: Connects Easily, Lightweight Cons: Too long when plugged in, Bulky Other thoughts: The connector sticks out of the phone too much with headphone plugged in. Looks like it can damage the phone if there is force on the connector. Best use it with phone put on a desk. Good thing is that microphone has its own wire that can be put close to mouth regardless of the headphone cable length. Should be better to use a smaller connector to the phone and then split the wires to microphone and headphones.

Pros: Connects Easily, Lightweight Cons: Other thoughts: Easy to connect.Useful for hands free calling.

Pros: Connects Easily, Good Volume Control, Good Sound, Fits well in ear Cons: Other thoughts: I primarily use it with my iphone 3gs. So far so good.

Pros: Good Sound, Plenty of cord Cons: Button tough to press, A little bulky, Inconsistent performance Other thoughts: It generally works, but the button is difficult to manipulate. 'Double-clicking' the button to skip songs can get dicey, especially if your hands get sweaty. In terms of sturdiness, it's Monster build, so no worries; I'm just not impressed with the button mechanism.