Positives:
The sound is truly outstanding about Apt-x. Devices without this codec sound (at least on large stereo speakers) is not as good and logically worse than RCA, for example.
The connection is really very easy to set up and remained far more stable.
Negatives:
Twenty meters range seem to me somewhat unrealistic. If there are no walls in between, I would run out, at best, of around 7 meters. For my purposes perfectly adequate.
The audio signals transmitted from the PC are due to the transfer quite minimal time lag. I will therefore watch me no movies about this connection.
Conclusion: If no apt-X enabled source devices are available I would go back to the cable back in any case, no matter how long would be the. The difference is really clear höhrbar and I'm sure more of a layman in the field. Connection stability and usability make the device but to a clear buy recommendation.