After reading kenmorekid's post, I completely forgot how many times I too ran over my foot with the SP WindTunnel. Like so many others here I’ve been using a vacuum from the time I could walk and I can’t ever remember running over my foot with any machine, and certainly not one with such force that it would actually cause an injury. This problem added to the many reasons why I returned my machine just before the one month mark. I even cracked a toenail and started to bleed just from running over it with the Hoover.
I don’t mean to totally knock the SP WindTunnel since it is a good machine, especially at its price point. However, since you have used a Generation Series Kirby, there is just no comparison when it comes to the two different self-propelled features. The SP feature is something that has obviously attracted so many people to this machine since it debuted, and probably why it has hardly changed after all these years, but it just didn't work the way I had hoped. With a Tech-Drive Kirby you can push as fast or as slow as you want and the vacuum responds the same way. Using the Kirby is like driving a nice car, but when you use the SP Hoover, it’s hit or miss. I found it too hard to modulate when pushing the machine to justify purchasing the SP model compared to the more basic WindTunnel, which cleans just as well and is easier to carry and push because it weighs less. Maybe its an unfair comparison as the Kirby costs at least 5 times what the SP WindTunnel costs, but as collectors we pay close attention to these differences.
I was using my grandmother’s standard WindTunnel on Friday night to clean up after we had cake to celebrate her 91st birthday, and while I don’t love the machine, for the $130 my grandfather paid for it, it really does clean the carpets well. One other minor but noteworthy feature on the standard WindTunnel is the NON-STRETCH hose. This hose is unlike the one that the SP model has which is awful to use, especially if the end of the hose seals against something, and be careful as the vacuum can fall over or pull itself towards you if you are on a bare floor. For my own personal use, if I were to buy another WindTunnel tomorrow, I would buy the standard non-self-propelled model because above everything else it’s just all-around easier to use.