In terms of functionality, the device works perfectly - we had no dropouts at all, and the added latency (as it is an active repeater) is entirely unnoticeable. The device was small enough to be hidden in the cable run in a plastic bag without issue. The overall design seems very robust, in particular the rubber casing is a fantastic choice. The power supply is a standard DC one - adapters for which are easily available. However, the power supply that comes with the device comes with the neat addition of a screw connector that secures it into place. We used this between Behringer X32 and S16 without problems. We only used channel A - I wonder whether both channels could be used even if not used for redundancy. I will be testing this soon!
All in all, a fantastic purchase well worth the money. Saved us having to run an unsightly slackline above the crowd, or a costly cable ramp. Would definitely recommend.