Personally, I don't like it. The hump on the back of the grip is far too pronounced for my taste. As a result it pushes my hand out and causes the trigger reach and magazine release to be farther reaches than I want on such a small pistol. I also don't like the button magazine release, I prefer the paddles. As such, the PPS M2 is the only Walther I don't like to date, and have no desire to own one. Fortunately, I did find a good deal on a PPS M1 just a few weeks ago that I sprung on.
That being said, there are tons of people who do like the redesign. From what I can tell, I seem to be in the minority of my preference. Try one out. Buy it. If you don't like it, you can sell it after the rebate is over. Likely for more than you spend on it right now.