"i have found sonata to be highly effective. i take 10mg when i get in bed and have relaxed a bit. i sleep 7-9 hours without waking up in the middle of the night. no grogginess in the morning. i have major depressive disorder plus gad, so sleep is very important in managing the disease -- and i get that sleep with sonata. i took ambien for a year or so but stopped when i washed dishes and cleaned my kitchen without remembering (sleepwalking, etc. are side effects of ambien.) weaning off the ambien was a horrific experience -- i had rebound insomnia and didn&#039;t sleep for 3 days. anyway, i highly recommend sonata."