Wow.. They are simply amazing and easy to operate. I feel more comfortable when seating and easy to carry.  I absolutely love my chair!. It arrived today just as scheduled. Tested it out, sat in it, layed back in it, perfect. So comfortable plenty wide enough for my more to love body. Does not feel shaky at all. I don't sit in just any chair because of my size but I felt very secure and comfortable in this chair. So far I have no complaints.