Before I started on MMJ I slept in 2 hour shifts, every 12 hours or so, due to neuropathic pain. Now I sleep for 8 hours - once I get to sleep. It seems that daily use does make it a bit harder to fall asleep (racing mind?) but at least I'm not just getting the bare minimum anymore.

Note that taking CBD reduces the negative effects of THC use, at the cost of less stoned. If using for medical reasons that's not a big deal. If recreational use it probably is.