Dude it is best phone but is lagging in just for updates and camera. The processor is damn fast. And by the way it is value for money but it is discontinued now. Im using it over one month. If u r an android devloper, u can root it so as to do what u cant.(except updating to kitkat and editing multiwindow) and it cant be slow with 1.7GHz octa core processor until this date is only available to very few mobiles that u can count on your fingers. If it is really lagging either use cleanmaster(truly effective) or check on internet for tweaks on android to make it faster.
Please dont say bad because I love this company and this phone.panasonic has a huge(15) devlopment facility that even samsung cant afford to have one also. And moreover there is limited content about p81 on internet.Guys if u found out something new.plz share and help out other p81 users .