Been using these for the past 3 months. It's one of the best investments I've made in my health in awhile. I use it daily for 4-5 minute sessions, usually after a workout. They simply hang off my pullup bar. I feel great after using them.

The tables are fine if that's all one has or if there are physical limitations to hanging and getting off and on a pullup bar. It's better than nothing. But with the tables you only stretch from about the waist area vs. with the boots you get a full body stretch.