Hello friends, I m using the lenovo zuk z1 from past 6 months , its really a good phone by lenovo , its a copy version of one plus devices , phones body is good at built quality , but its a bit havier phone , phones perfomance is really very good , I did not experience any lag till now , the one draw back is that lenovo is very slow in giving the latest android update to their phones , loudspeekers are placed at the side bottom of the phone so its very good , touch of the phone is also very responsive and 3gb ram is a very good concept by lenovo , if you want a phone which have lots of inbuilt memory and you are a hardcore gamer than buy this phone