Having been a long-time LP user, I decided to try out BW some months ago, and have been using it as my password manager for several months.
I like the ethos of BW - open source etc. - but the overall UX of LP is just so much smoother. BW has some good features, in particular explicit association of multiple URLs and apps with a single login.
But for ease of opening a site and logging in, as well as general form filling, LP has it nailed by comparison to BW. I use Chrome on Linux, and Android mobile, and BW just takes so many more keystrokes and/or mouse clicks or taps.
The killer on mobile is BW’s lack of an overlay. Not only is switching app screens slow, there are some apps that this just won’t work with. LP’s overlay is slick and simple.
I shall keep an interested eye on BW to follow developments, but for day to day use it’s going to be LP for a while yet.