I keep a paper logbook as well, because, well...I like to. I keep the electronic one because it makes doing 8710s, tracking my instrument currency and medicals a breeze.
Being able to set the same number of rows on the screen lets me audit both logbooks against each other, which makes it MUCH easier to find discrepancies when I'm adding things up. If I only flew my RV it would be a different story, but I work out of a busy flight school and fly bunch of different aircraft - singles and twins - and it helps me stay organized.
I HATE the look/feel of Safelog, although the mobile is marginally better. I tried migrating to ForeFlight once, and it just wasn't working out the way I wanted. I think SafeLog owns me now and I should just accept that fact.