I have a very old Van R that was pushed three years ago. After a little use, I switched to a pushed RP3 that gives 95% of the performance for much less weight and it now sits as a standby shock.
However, the van R's performance is better that the RP3 if you're just comparing performance.
For me, I'd not hesitate to get any rear shock pushed again, but it depends on why you want it done. As a heavy bloke on a long travel horst link bike, my shocks tend to wallow in the mid-stroke at the correct sag. Pushing them gets rid of this so my bike doesn't ride like a dog scraping its arse on the ground.
GW describes some of its behaviours very well, and I think he's right – If you don't know what you want, leave it till you do.