What every best has:
Some reviewers find that the One Touch works well on any round can, no matter what the size, while others report success only with medium-sized cans. Even enthusiastic reviewers mention some caveats: Though the One Touch opener leaves a smooth edge on the lid, the edge of the can itself is very sharp and dangerous. Therefore, this can opener isn't recommended for use around children.
The main drawback, according to owners, is that there's no way to know for sure when the batteries need replacing. If the batteries die while the One Touch is cutting open a can, the device often gets stuck and it can be difficult to remove. One user says it could take as long as 10 minutes to pry it off.
Overall, the One Touch can opener seems to work well enough -- provided you get one that's not broken right off the bat. Because it doesn't require users to grip a handle, it's well liked by those with arthritis.
We found the most illuminating reviews on the websites of two TV stations: KDKA (Pittsburgh, Pa.) and at KFVS (Cape Girardeau, Mo.). KDKA explains why an apparently defective One Touch can opener needed resetting; when the instructions are followed carefully, it works fine. At KFVS, however, it's clear that one of the two units really is defective. Tests at two other TV stations are also helpful, as are owner-written reviews -- especially at Amazon.com -- where nearly 200 users review and rate the One Touch.