Yes, I've been on Effexor XR for several months now with positive results. It is important to note straight off that I have taken several anti-depressant and anti-psychotic medications for depression and OCD. Apparently I am fairly resistant to the side effect profile many of these meds have. Only two meds caused meaningfully bothersome side effects for me: Zoloft (irritability, drowsiness) and Seroquel (weight gain). I mention this here as I am aware that Effexor has a reputation for many unpleasant side effects, so my relative resistance to side effects from this class of med is likely part of the reason I have had success with it.
I experience no side effects from generic Effexor (venlafaxine) and have been stable as far as depression is concerned while on it. Positive response for me. However, Effexor is not the most effective SSNRI I have taken. That award goes to Cymbalta. Unfortunately Cymbalta is still on patent and prohibitively expensive. I couldn't afford to stay on it, so switched to Effexor in hopes that it would be mostly as effective. And it has been. I will switch back to Cymbalta when it becomes available as a generic.
I currently take 150mg venlafaxine xr capsules.