Saves battery power when there is no connection
PC-compatable (but no anolog buttons/triggers)
Cons No motion-sensitivity
Very hard to press L2/R2 buttons
The anolog sticks are very weak feeling with little resistance making it harder to be precise
The USB dongle is easy to lose
Summary While this controller is an OK alternative for the price... You can easily find a better alternative. I would not reccomend this to people, though Logitech's customer service is GREAT! (if it breaks and its still in warranty, they will send a new one to you no questions asked) But because of the missing motion sensitivity, some games wont allow you to use it because of the need for it.
Pros it's wireless, most of the controls work, i.e., swapping weapons, aiming, etc.
Cons controller moves on its own, hard to turn and does not respond well to Dpads you cannot turn on a dime.
Summary I would not recommend it highly, solely due to disadvantage in the mobility.