I have tried it, I really think it is a good option to try!
I am currently also in benzowithdrawal which is part of the reason I tried it and it did not work for that. It works better for alcohol and heroin addicts.
There is another person here on the forum who had good results with NAD+ for its PAWS and DP.
It is not cheap, but it is something special...
Once I am off all this crap I will try it again.
If you can afford it and you are suffering I would certainly give it a shot.
I have too much going on with my brain chemistry right now for it to stick for the DP and my anxiety is raging because of the benzo withdrawal so I believe DP cannot leave while you have anxiety.