I have robotripped quite a bit.
If done right its a lot of fun.
I recommend getting the gel caps, do not chug a whole bottle and do not get triple C's (coridin cough and cold) because they have some other active ingredient that will fuck your shit up.
I used to take like 30 gel caps with my buddies and just listen to some dead/floyd or techno. shit was super fun. 300mg is a pretty solid dose for getting loose. I would def. try it if you like shit like that. But be aware the hang over is fucking nasty. Its almost like your drunk majority of the next day, I had to call in sick to work cause I was so fucked up.
check out the DXM file at erowid's it should be suppper helpful.