ZUNMOS Office Executive High Back Chair

No idea how comfortable this is, or if it will last, as I CanNOT use it! Getting the bottom screws into the chair back has proven to be impossible to do alone. Someone needs to hold the chair back up at an angle. I have no to do this for me. Notice in the video on how to put it together they sure cut off showing the front of the chair, where some obviously had to be standing hold the chair so it does not roll around, AND hold the chair back at the correct angle to insert screws. NOT A HAPPY CUSTOMER! Useless chair without a back on it. Eventually got it together, though after a couple months of use the chair will not stay lifted up. Maybe for a few minutes & then it slowly sinks down over a period of a couple of seconds. WASTE OF MONEY.