Tranquili-G is very good for sleep and also general relaxation and mood, but it's not as strong as the old GBL products. I think its a little too expensive, but I used to get GBL really cheap so maybe I am just spoiled.
I haven't used Midnight Blue. What is in it? Most of the replacements have diphenhydramine hydrochloride which is just Benedryl. That makes you feel pretty loopy and drowsy but it gives a hangover and wouldn't increase GH.