There is a downside to using MJ as a sleep aid. If used habitually, it suppresses your REM cycle (there have been other posts on this, do a search). Experiment yourself and you might find that once you recover from the insomnia after daily (nightly) smoking, your dreams will come vividly rushing back. MJ induced sleep is actually a much LESS restful sleep if used habitually. It's a major reason that I limit my own use.