I work remotely due to health issues. I have core hours (9:30-5:30, generally)but honestly my work is extremely flexible. As long as I'm hitting deadlines and I'm able to respond quickly in an emergency (which are pretty rare for my work) my manager doesn't care how long or what times I work. I do about 42-45 hours a week (salaried but I have to use a timecard because I do client work).