I have a Teeter of some sort. I paid like half price for it because it was a scratch and dent model. It is helpful, esp if I use it daily.
There is def some pressure in the head but that subsides the more you use it. I can go 10 mins or so with no issue.
For the ones that hang you from your hips, can you maybe lay over a table and have someone hold your legs? Or get on one of those back extension things they have at the gym.