I've been using the previous model for about 4-5 years and although it worked pretty well, I was pleasantly surprised with this new one. I immediately noticed the slightly larger cleaning head. The included microfiber pad is improved as well, it has a combination of a soft microfiber strip down the center surrounded by a coarser, terrycloth-like  material on the edges that seems to get a better clean than the old pads did. The spray bottle and dispenser mechanism has even been improved. The bottle of cleaning solution does not collapse or pop loose after a few sprays as the old one did. The entire mop also feels quite a bit sturdier overall.