Pros: I did not have to do anything. It is preprogram and ready to use.
Cons: I have none.
Overall Review: I still have dial up and with the new computers you have to go buy your own modem. This is the best price and the best working modem I have found. I will get another one if and when this one goes. I have even gave one to a friend about Nov. 2011 and its still working too.
Pros: I like the 8 pack deal. When you think about the price per battery it's a good price compare to putting a regular one in the trash after a one time use.
Cons: none
Overall Review: This is my first time using this brand. I'm looking forward to getting many more charges out of these.