I not made the switch...thinking about it
Some one posted in another thread You cant turn the light off on the PW3 & they only get about 10 hours reading in before the battery dies. So as a 18 hour a day reader & my K3 only needing charged about 2-3 times a week.... that put me off. True when reading I need to use the M-Edge lights but when there battery dies takes 1 min. Not Hours. My K3 takes 2 hours to recharges Not 4 hours like I heard. IF this is true then I not sure changing going to work for me.
OP IF you do a lot or reading think about what I posted. Then make up your mind