50/ 50.  We bought two. The first was great, no problems. The second had mismeasured pieces from the start. It was less than 1/4" and we tried our best to put the extra at the top. It rocks anyway. Plaster walls can't take that much movement, even with heavy blocks on the bottom. Several pieces weren't compressed properly and the given screws and even backboard nails split them into layers. Since you aren't reimbursed the first shipping and have to pay return shipping, then NEW shipping on a new item, we have to turn it sideways and attach it to our nice entertainment system discreetly. I also have had to put woodglue in the split layers (drying while clamped with snack clips) and the gap due to the mismeasured factory pieces. First one was GREAT, second was NOT.