Bests & Worsts Reviews from Amazon

I ordered and received the product to help relieve pain from my lower back and neck. I did do some researching and it seemed a lot of other products wanted more money for little frills. I picked this one because it emphasized the air cushions at your feet to eliminate discomfort that most machines seem to give while you are hanging for a period of time. I used the machine for a week with no issues. After that time, I noticed the locking mechanism starting to not catch and release so easy. A few weeks went by and then my son got into the machine, used it and then tried to release himself out and COULD NOT get it to release!!! He was actually stuck for 10 minutes when we finally somehow got it to unlock. I called the company and spoke with customer service representative, Christine. She told me to do two things and they would immediately send me out a new locking mechanism. I immediately sent them the two items needed: copy of my receipt from Amazon and a picture of my serial numbers on the machine. Days later I received an email saying they are still waiting for my receipt but they had received my serial numbers. I immediately recent the email of the receipt. I have called 4 or 5 times now to check on the progress and when I will be receiving my new locking mechanism so i can start using my machine again and have been unsuccessful at getting a person on the phone. I get a recording EVERY TIME! This is followed up with an email saying they still need additional stuff that I was told I need not send. I am currently still waiting to be able to use my machine that I purchased two months ago