So we have been trying out our free water saving devices for just about a week now. The shower head is very good and you cannot notice the difference when you take a shower so I would recommend getting one of these.
The tap aerators did not work for us as they did not fit our size of tap so we shall have to buy a new one for the kitchen tap !
The timers for shower and tooth brushing work well and we are using them. The gel for the plant pots also worked well and I might buy some more of this for when we go away in the Summer.
So all in all a good lot of freebies with only 1 fail in the whole lot. I would recommend that you find out what your water provider can offer by way of water saving devices and try a few out !