I use this plugin to have a set of tabs at the bottom of the page with additional content instead of a really long page. It works perfectly, and unlike other plug ins that I've come across, the tabs don't stack up on small screens (and I've tried a number of plugins) instead it switches to an accordion without any fuss. I'm wondering whether the people giving it bad reviews are trying to do things that the plugin wasn't designed to do - or doing things where there's a high risk of conflicts. Keep things simple and you'll be fine.
I wish it was easier to customise the look-and-feel, but at least it does the job that it's supposed to do.