Simple and very effective

Does exactly what it is suppose to do. I have my products ordered as custom menu order and I noticed a quirk with the standard single product navigation where I was only given the option to go back to previous product when I was on my first product (so it was being treated as the last product not the first), this may have been something I had configured incorrectly. This plug in seems to have fixed this for me where I can go back and forward no matter what product I land on, in the order I expected.

Easy to use as documentation is very good, and it is fully integrated into WooCommerce Settings Tabs.