Pros: -cheap
-small
-easy to use (just charge it with USB -> mini jack charger, press button for 5 seconds, pair with cell/pc, use code 0000)
-good sound quality (my Creative EP-830 in-ear headphones don't get enough power due to 16+ohm in most other devices, like cheap MP3 players).
-Clear manual

Cons: -Travel charger is for USA, but supports 250v, so with adapter could be used in Euro mains.
-Earphones / Headset included have low sound volume and quality. Buy some quality ones and you will enjoy immensely more.

Other Thoughts: Coupling with PC using BlueSoleil 5 worked perfectly.
Coupling with SE Z550i also no problem.

Bottomline: Excellent product for it's loooow price. Compare with local stores this saves you at least 25$.

Pros: -Very good sound quality
-Easy to use
-Much cheaper than any other kind of these

Cons: -Poor earphone quality (but you can change them)

Other Thoughts: 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words 500 words

Bottomline: -Good buy

Pros: Works (mostly) fine with iPhone 3GS. Streaming audio, phone calls- everything worked fine. Mic adequate- no complaints from the people I spoke with.
Decent sound quality, decent battery life (5+hours of streaming audio with a couple of short calls).
(note- AC charger requires 110v minimum- if you live in, for example, Japan, the included AC charger will not work, but you CAN charge via USB or via AC/USB charger, like the one bundled with the iPhone)
DX Customer Service was great- The first unit I received had a defective battery, and wouldn't take a charge. DX promptly replaced unit with a functional one at no charge.

Cons: Pairing is a bit tricky- and occasionally needs to be re-synced from time to time.
Included headphones should be discarded immediately- a complete waste of plastic.
Plastic buttons are shiny and slippery, which makes controlling the volume difficult since your fingers will slip off the button while pressing. Also, track forward and backward buttons do not work with iPhone 3GS- only play/pause, and volume up/down are functional.

Other Thoughts:

Bottomline: You cant beat the price- as a bare-bones Bluetooth receiver you simply can't find a better bargain. Just be aware of the unit's limitations.

Pros: -It is very small.
-Very easy to "clip on" on you.
-The build quality is really better than I expected, it really looks like a much more expensive product. Made of a very good shiny black plastic.

Cons: As said by other users here, the plug used for the earphone is the same used for recharging. That is not actually a problem, it is just that it might be better if it was a usb mini conector, so one might use with existing cables on the pc.
The package it comes in is bigger than it should be. A problem specially if you don't want it to be too noticeable by your contry's customs. (Cuidado brasileiros!!)

Other Thoughts: A very nice product, you'll have to get used to how it operates, but it's not very hard.

Bottomline: You won't regret buying it!