We bought two Aviana chairs. The Problems:
*The parts are milled with such a fine tolerance, it was impossible to get the stretchers to sit in the slots without sanding the edges. 
*The seat slats started bowing/deforming downwards the first time I sat in the chair. I weigh 178#'s...seems a MAJOR flaw. I have asked for a replacement part, but I am not hopeful, seems like a real material/engineering flaw.