They can lift you up so high that you feel WONDERFUL
And they can take you to the pit of your deepest FEARS ANXIETIES and TERRORS.

Sometimes in the course of the same trip
Sometimes you get good ones and bad ones
It is worse if you fight it.

I think the down side of it is pretty inevitable.
You can do stuff to minimise it (good self-talk, taking them in a safe environment etc) but the bad trip will get you in the end.

I just tell myself:
IT IS ONLY THE DRUG - IT WILL WEAR OFF IN XXX AMOUNT OF HOURS
But that doesn't combat the fear entirely.
So I guess my answer is:
Both better and worse,
Both better and worse.