I have about an hour accumulated of extra time I've spent at work that I wanted to use to leave early. However, it seems much more sensible to leave early and explain that I have extra time accumulated, then to be late to work. And sometimes I am just plain old late to work and I can't do anything to be on time. The powerlessness of it all kills me, and it feels like working well stops to matter when you're late.
I wouldn't say I'm late very frequently but it feels like I am late more frequently than other employees. Being late over 5 minutes happened only about 3 times so far and I've been working here about 6 months.
My company has flexitime available but it takes me over an hour to get to work, and so most of the time I'm set to come in the later times of that flexitime already.