Old thread, but I changed my oil yesterday with an oil extractor, and man was it a breeze. I changed the filter & O rings while the oil was sucking out, and the entire process took appox 20 mins. Got just over 8 qts out, and since I don't put that many miles on my car per year, not worried about the cup of oil oil left in the sump. No splash shield, crawling under car etc....
My Challenger and wife's Jeep GC also have topsider filters, so the extractor is a no brainier for me.