When buying an inversion table, choose one that is comfortable to you and is easy to use especially if it's your first time to use one. Look for one that has adequate padding and enough space to move around in a workout.
Check also the quality of the parts that comprises the machine. It must be sturdy enough to carry your weight to avoid serious accidents.
Only purchase tables who have a warranty seal in case problems or malfunctions occur.
All new we recommend Inversion Table Therapy from MasterCare. Featuring a 15 or 30 degree locking stop, the back traction table from MasterCare is the perfect solution for back traction, back stretches, and inversion therapy Not only is it the most sturdy, durable inversion table we tested, it's also the safest and easiest to use.A proper back traction and lumbar traction table will provide support while unloading the back, as well as other weight-bearing joints like the hips and knees. The Swedish inversion table from MasterCare does all of this and more.
Models are adjustable for patients up to 7'2" in height with a weight limit of 330 lbs. The stand is constructed of steel. Patented sliding back rest and self-controlled locking system for 15 and 30 degree inversion. Prone position in 15 degree inversion is excellent for adjustment and massage. Simple stretching and strengthening exercises help promote healing. Beneficial in the treatment of knee arthrosis.

I am a 56 year old female who has just been told I have double scoliosis, which may be part of the reason for my sciatica. I am trying to find out if inversion could be helpful for this. I also have fibromyalgia and was told that inversion could help with some of the pain I experience from them. I just want to be sure that inverting myself will not make the problems with the scoliosis worse.