Two months ago I did it again, the poly ones were looking a bit out of shape (60,000 miles). Very easy the second time around! I liked the ride but my stock ones had 240,000 miles on them. I may replace the stock ones on another set of arms I have, but I will definetly need a press for those to go back in, a socket and hammer really f 'd one up(I wouldn't want to drill, cut and pound out bushings later if decide to poly after that).
Wait until you do the trailing arm bushings!