Stilnoct is one of the better sleeping tablets and I have had no side effects from it. It helped my insomnia hugely as a short term measure.
I never felt groggy from the tablets either. I would have to say I recommend it as a short term solution. I had insomnia for 2 years but I think the best advice would be to look at stress as that is the most common cause of insomnia. I would not worry about becoming dependent on stilnoct either.