I'm definitely a fan-I have a hard time because many liners tug or irritate, and the 24/7 liners do not. I have the full-size of Electric and Dime, and then small sizes of the ones in the set (Electric, Lucky, Zero, Lust, Covet) and Bourbon. I really want to get the 1999 or the Gunmetal next.
I've never had ANY problems with them smudging though, that's just me. And I don't use UDPP where I line.