Wow, 40 meter range is a very long range. Thank you for the review, it is good to know this exists and most importantly it performs well.
However, besides a garden party, a stadium size listening room or a bizarre field measurement, i struggle to think of a use case for me nowadays. If i have a system in a spot without wifi signal, i would try to fix that and plug a wiim before investing in this device, specially as with this the communication is unidirectional from wherever the source is... Don't know, i am not surprised if there are so many for sale in ebay... but well, use cases are always way more than one can imagine...