Well its an opiate high, I'm guessing you've never tried heroin, have you done opium?
You get a warm fuzzy feeling through your body, and its very euphoric. Also makes your somewhat sleepy and very just peaceful and euphoric. Sometimes you can get really itchy but thats not a big deal.
The oxycontin is best to take a bunch of because they have no tylenol, but it depends on the mg.
The hydros all have tylenol, and so do the perks.
www.erowid.com