Works for what it was made for, but I wish it had two channels(?) so you could use one device for both SPDIF Out and SPDIF In instead of having two separate devices, both with their own power adapters.
I'm using it between a Kemper which has RCA SPDIF and my audio interface which only has a Toslink input. Works well for that use and the power cable is sufficiently long not to be on the way.
You can switch the "direction" with a small switch on the side, so you can either convert RCA input into Toslink out, or vice versa.
The construction feels a bit cheap, but this device is not really meant for touring or anything.