Well, been trying to do this things for a bit now, and I say trying because the recommendation is 3 times per day for about 20 minutes each and I have only done one or MAYBE two a day, but not even every day. But here are some inital thoughts:
This is the thing I bought from Amazon for my neck.
Only ran about $20 so thought it would be worth trying.
Built well and easy to use. Essentially it inflates to (supposedly) help stretch the neck and decompress the cervial vertebrea. When I wear it I do feel some relief from the numbness down the arm, so it does do something, but nothing premananet yet. it is a bit uncomfortable to wear/do, but nothing ridiculously bad. I will continue to use it and hopefully get more regimented about using it to see if I can get more relief.
So, would I recommend it? Ummmm...I won't claim any mirccles at this point, but for $20 it is worth trying I think.