The episodes I've seen have been overdubbed, rather than shown in the original voices with subtitles. The "acting" quality of the voice-over is ok, but it really takes the tension out of the show. It's a bizarre choice, considering that the American version of the show has subtitles up every time the contestants whisper.
If they rebroadcast with original voices and subtitles, this will probably be a 7 out of 10
If they rebroadcast with original voices and subtitles, this will probably be a 7 out of 10