Well, to say the least i thought there would of been more than 2 in a Massive box u get them in, and there not as good as i thought they would be and better sticking to your tiles than in the bath, as water gets into the plastic parts, Not impressed! and also sucker things now dont stick for some reason :os
I'm guessing the quality must have changed vastly. I've had these for at least a year and they amaze me in working through all the abuse we can dish out. I've never had a problem with water ingress and my year old daughter has been eating them for as long as I can remember. Changing the battery simply requires one to unscrew the two halves and then reverse the operation ensuring the seal is in place. One niggle is that if you drop these from a height onto a hard floor (or bath), they fall apart but can be simply screwed back together again. I'm buying a couple more because during one such drop, we lost the seal somehow.