I Have Double tap to wake

[calfee20]

I had to buy a 925 to get it (booo Hiss in background). Yeah I know I can be a jerk.

I do like it though but I will tell you if the battery life sucks that will be one of the first things to go.

 

[Laura Knotek]

I'm using double tap to wake on my 920, and I haven't noticed any adverse effects on battery life.

 

[s_lek]

Yeah I am turning mine back on, it is a good feature I doubt I will notice anything on my new phone ^_^.