Codeine Feedback

I mentioned in the other thread that SWIM is getting some 15mg codeine sulphate tabs here pretty soon. SWIM has no experience with these and felt the need to try them out, because of the price factor. After reading erowid on dosages and such, SWIM will prlly start at 150mg or more. SWIM is wondering about other people's experiences with codeine. What are the negative side affects? SWIM does fine with hydro's, perc's, etc. Was wondering if codeine as rougher on the stomach than these, or any other potentially negative side affect. Also is codeine good to mix with hydro's? My theory is you would prlly need less of the codeine, and you would also get less of the acetimenophen. SWIM is a not a heavy user of opiates. Even less than a weekend warrior at this point, so tolerance is not a factor yet. Just looking for feedback on this form of opie.