I've tried the Teeter inversion table at my local PT clinic. Felt good, but was limited to 5 minutes due to a potentially dangerous rise in interoccular pressure. Also noticed pressure/discomfort from hanging from ankles.
Has anyone tried
a LumbarTrac contraption? Much more expensive ($2250) vs. an inversion table ($150-300) but benefits are that spinal decompression is not limited to 5 minutes and user can control exactly how much decompression is focused on the lumbar region and spine. There's also a neck decompression feature. Here's
a video that shows how to use it.