The original Wii sensor is well ... except that its wire is very fragile. So I found myself with a severed wire and a sensor unusable, I searched Amazon replacement sensor. I found my happiness with this wireless sensor, childishly simple to install: the batteries (4, not included), press on the power button and presto, everything works perfectly! In addition, the seller was super fast (item ordered Tuesday night received Thursday morning, in a small provincial town). So total satisfaction.