Please do us a favor and list all the active and inactive ingredients - we need to make sure there is only DXM in there (there are sometimes things like guan- something that can be dangerous in large amounts).
I would expect a great time but you might wanna drink it on an empty stomache or else beware of puking. Even then, beware of puking. A good dose is 200mg for starters in my opinion just to make sure you jive well with it, but hopefully others will chime in. 200mg is a relatively low dose, the real psychedelic effects are more towards 350mg+ but it depends on your weight, how much do you weigh?