Cons: [Note, I got warranty replacement in 3 months and the replaced item has same issues as listed in the cons below, so they are standard lackings in the product] 1. Battery Indicator never works - it is a mere gimmick 2. Absence of the Indicators for Num Lock, Function Key Lock, Scroll Lock is more inconvenient than I thought. Makes case change typing really complicated. Very unpractical. 3. Both original mouse and second mouse went nuts after few weeks of use. They become hard to click causing RSI condition for users. 4. Keyboard batteries do not last beyond 2 months even on moderate use of 2-3 hours typing a day. 5. Dell does not have straight forward customer service for peripherals which made customer service experience a nightmare during warranty replacements.