This is a great looking piece, I love the way it is designed, however, when assembled, there is significant movement from side to side.  With minor arm movements across the face of the desk under very normal desk top conditions, the desk sways from the left to the right considerably.  I am thinking of adding some L brackets for stability, which is not what I thought I would have to do given the price.  

Like I said, looks great, well designed aesthetically, but if it isn't stable appearance doesn't matter.  I'll keep it and use it, but I have some buyers remorse.