"i&#039;ve been on lunesta now for approximately 8 years. i take the 3 mg does at this point and usually take it every other night. the few nights that i can&#039;t fall asleep within 30 minutes or so, i&#039;ll take 1 pill and normally i can fall asleep within the next half hour for about 6 hours. when i do fall asleep at bedtime without taking a lunesta,  i&#039;ll usually wake up at 2 or 3 and can&#039;t fall back to sleep. taking a lunesta at that point will give me the additional 3-5 hours more of sleep.  
after taking it for so many years, i don&#039;t even notice any metallic taste . i usually do not wake up feeling groggy or tired.  works great even though i&#039;m concerned about long term unknown health issues. don&#039;t want to grow two heads.."