The end result is OK, luckily I am using it in the office so it will not be on open display. I have been building furniture for around 50 years and have never come across such a difficult unit to assemble. I believe that I had two sides exactly the same i.e. not the opposite ends so I had to modify the way it was put together. Due to this the front upright side posts had to be screwed from the front to keep them in place, which I did discretely and so no real problem.
I would not recommend purchase of this unit if you are not experienced at assembling units. The instructions are totally inadequate. If they were better and the correct parts carefully packed for shipping the end result is not bad looking. If you want self assembly furniture and are inexperienced at assembling shop at IKEA.