Yes, but I do not own a PW, as I generally read where there is good ambient lighting.
I would absolutely consider buying a nice e-ink device without front light even. I would much rather have a larger screen size(I want to see 12 inch e-ink device outside from prototypes, but would settle for a sufficiently powerful 9.7) than front light.
Then again, I must be an edge case, as the market is pretty much all about 6 inch devices these days.
In my childhood it was considered to be a bad for your eyes to only have light hit the book and nothing else.
Frankly, I would be scared to use to use something like PW in a dark room for a prolonged period of time.