I have no plans upgrading my desktop to Hardy Heron, especially with what I experienced the last time I tried upgrading my Kubuntu desktop. But I had just replaced a broken hard drive off a Dell Inspiron laptop. My wife insisted that we install Linux on the thing and since I only had my Gutsy cd, that's what I installed. I then tried to upgrade the installation to Hardy figuring that since it's a fresh install, there should be no problems, and there weren't.
So I am now typing this post from the laptop, playing around with it. It seems ok to me. Time will tell if there will be any inconveniences, but I am happy right now. Learned new things again. :)