I have purchased two BD bikes so far, the first bike had a damaged front derailleur, which I replaced as a preplanned upgrade, and the second bike's front wheel arrived with a broken spoke. Both incidents were easy fixes for me, but a novice rider with little or no bicycle mechanical skills would have found the BD bicycle buying experience a little more frustrating to say the least.
BD's time frame for putting the bike together might be somewhat optomistic, but I cannot say for sure since I use my bikes extensively, I disassemble, inspect, and reassemble them to my specs which takes considerably more time.