I decided to record my experience with it because with a device like this you want to know if it's easy to use (easier than using a knife) and if it actually works. The answer to both is an unqualified "Yes!". On the video you'll see me using it with no rehearsals and having only glanced over the instructions. It probably looks a little harder than it is. The next time through I'd do it a little differently. For example, I realized I was pushing down while turning the device. That probably isn't necessary because it has a corkscrew design that will pull it through the pineapple if you just twist the handle.
I ended up with a nice need cored pineapple spiral. There was very little waste, I think no more than if I had peeled, quartered and cored the pineapple the normal way. As a bonus, you end up with a nice pineapple "hull" that you could serve drinks in, if you had small pineapples. Or you could serve a salad in at a party.