The speed of delivery was excellent. When there was a problem with the device, a replacement at no cost was dispatched at once with no charge for shipping in either direction. Unfortunately, one of the control features on the purchased unit did not function properly (would not reverse the direction of fan rotation), but the control worked in all other respects. The replacement unit also failed to activate the reverse function. Our fan had, inadvertently, gotten stuck in the reverse mode (pulling air up), which we had never chosen. Since the replacement worked in the pushing air down mode, we were happy with the unit. We never intentionally used the reverse mode anyway.
Customer service was the best.