the headset is really awesome just plug and play. sound quality is awesome! bass is a bit lacking but its ok for me. The clarity is awesome and its also very loud(quality remains unaffected with increase of volume). it fulfills my gaming and music needs. the microphone is outstanding. value for money i would say!

Technically
The device is most satisfactory if your purpose is to skype or have a telecon.
The audio for music is good, If the source music is good, the sound is like a normal headset.
It has a reasonable bass - not so much as to thump, but - okay. If one wants to listen to music for the nuances, one has to go elsewhere.
The blue led stays on when connected, the volume control on the left is very handy as the buttons are big.
The microphone is the best thing about the 665 DSP. It is sufficien...

i like the product .. its awsum n easy to use .. specially i like its sound performance. But one of the disadvantage its mic setting will not efficient perfect in laptop.

product warranty not supported from the shop owner
dont sell this product again

I got these from another site as Flipkart had cancelled my order.

But i'll review the product:

I brought these for office use and they do the job. I use them with my MacBook pro and they work great with it. The sound is crystal clear and the mic quality is very high and is able to block out other noises with its ambient noise reduction tech. I also use it for listening to music and sometimes watch movies with them too. The sound output is great!

I like this headset very much.....Good clarity for voice calls .. .Audio is really Good for hearing songs .

hi,

headset is nice, awsome sound, mike is a bit creeky, usb is almost ready to break. very poor quality. cable is ok. could have made it better.

GOOD-
Delivers a very good quality of sound.

BAD-
No MUTE option which is SHOCKING considering it is a chat device.
The USB connector is BIG and runs a risk of breaking accidently
The microphone is over-rated: the review said that it cuts out the noise around and gives a studio like experience (check the videos on the Plantronics site). They made it sound like a LAPEL or even a COUNTRYMAN microphone. However, it still captures ambient sounds.

VERDICT-
Makes me feel like I did not get my...

Fantastic sound and crystal clear voice recognition makes this the best headset I have purchased. I have pretty much moved to using dragon/ windows voice recognition to instruct the computer when I am feeling too lazy to do extensive typing on the keyboard.

The only drawback I find is that the headset hurts my ears (physically, not the sound) when I wear it through a complete feature length movie. It can't be worn for hours together.

Have been using these for a year now.

Pros:
Very Loud.
You can actually feel the beats!
Excellent noise isolation.
Even the mic is very good.
Volume rocker works very well.

Cons:
USB connectivity - can't use it with tabs or mobiles.
Even if your tablet (android) has a USB port these won't work because the driver will install only on windows.