For my money, the best vegetable peeler is the simplest and the least expensive; the old fashion, all metal peeler with no bells and whistles, like the one in the illustration above. I don’t like the fat feel of the new designs with the big plastic handles and I find the ones with the blades horizontal to the handle tedious to use; first illustration below.
I also find that the ones with the space between the cutting edges too far apart don’t peel, they gouge chunks out of your spuds or carrots; second illustration below.
Illustration number three is quite cumbersome to use, so, its back to basics. If it ain’t broke, don’t fix it.