I had been using a Razer Abyssus, and a Logitech g300 before i decided to buy this one.
I mostly play MOBAs and very little fps though, and this mouse just serves the purpose.
Pros:
The grip feels nice, no slipping
Buttons are comfortable, thumb ones too are good
mouse is heavy, so provide good grip
dpi range is good
sensor also is good
logitech gaming software is very user friendly

Cons:
no braided cord
no fancy led

It still is a great mouse for gaming, but if you want fancy looks with al...

So I am using this from months and My sniper skills have been improved a lot and guess what I am on 1st in leaderboard in bf4.

Bought many gaming mouses which stop working after a year but this one lasts and is amazing product to buy.. Only reason for one star* less is it doesn't has some memory slot to save the preferences which makes using the software compulsory.

Really good performance of the product , I have always used Logitech , my Keyboard, mouse , Gamepad , Webcam , microphone and camera are all logitech ! No worries ! Never had issues !

This mouse takes care of any fps gaming needs in tight budget, be it CS:GO or CoD. Been using it for 3 months now, no problems.

Pros: Everything.

Cons: Nothing.

The time I used this mouse I was just impressed by the performance of this mouse. i'm using it on 3400 DPI and in games it just do miracles. I tested it on FarCry 3, FarCry 4, Battlefield 3, Battlefield 4 and WatchDogs and it is damn comfortable and sensitive. i just paid 899/- yea seriously at this price point it is BANG for BUCKS!!!

Firstly i got this mouse for 900 bucks!! I didn't think twice, just bought it .. only con is that it doesn't have grips embedded on scroll roll that makes it very slippery usually when you sweat, and also thumb, pinky padding is required on either sides otherwise it makes it slippery.

This is the best mouse which you can get for the price and truly a headshot machine where you can customize your own dpi and keep default dpi at the click of a button on the mouse.NO WORDS JUST GO FOR IT.Excellent service by flipkart it reached within 2 days and i got it for Rs.650 (killer deal) the price was 899 and ws retail exclusive offer for 250,
Cheers!!

I have been using htis mouse for about 6 monthsnow and the left click has already gotten soft and dosent click sometimes.

Stay away from G400s!
Button Quality is awefull .Am calling in for a warranty replacement .
Get the new G402 its much better at the same price.

Bought this to replace my MX518. It seems like an adequate replacement and I am happy with the purchase.