The unit was really fast supplied with standard shipping. It looks good and know eigenltich no processing defects. The air flow is at all levels to match but could be slightly higher at level two. The power cord is too short so deliver 1 star. The fan is audible but is the airflow caused, not disturbing engine noise etc. The other end clunk described in panning mode I can not confirm. The assembly is really easy, the fan is ready for operation in 1 minute since.