I started using the very same apple peeler close to 40 years ago and have been very happy with how they work. The one I'm currently using must be close to 20 years old and I've never had any problems with it, even the vacuum base works very well. However, I've found that if I first moisten the bottom before attaching it, then press down firmly before flipping the lever, I don't have any problems with it. I attached it to a lipped cookie sheet to minimizes the associated mess, and the vacuum base seems to work better on a metal surface.
While it does a great job of removing the peel a misshaped apple won't be completely peeled. I normally have 2 large metal bowls of water to which I add Fruit Fresh to prevent the apples from turning brown. Peeled and cored apples are placed in the first bowl until it is filled. Next I cut the the apple in half, check for bad spots and remove any core that was missed. The slices go into the 2nd bowl. When that bowl is filled the apple slices are put in a colander to drain. They then can be placed on the dehydrator screens for drying, or into ziplock bags for freezing.