I haven't gone 1 weekly pay period in 2016 without some issue (late, missing, short paychecks, shifting paydays) or another. But I can't convince my CEO to go with some pros (ahem, ADP), yet. But they are very sales-centric and realize they have a problem... so there's some hope for them.
Everyone here is pretty frustrated with the situation. And the next time Zenefits fuck up, which I presume will be Friday, I will submit my already drafted ADP-Or-I-Resign-Immediately letter with timeline of their 8+ previous fuckups.
Edit*: It's 2016, not 2015... so every week we've use it