How easy it is to press the button !!

[Mups]

ooooh I could do with one of those, I can never find my phone. I use the house phone to call it, if I can't hear it then it'll be in the car 

Same here.  

[muddy]

Me too I also have find my phone app on my iPad .

[klondike]

It's a mistake not to have a mobile with you at all times if you have one.

 You may  not be in any fit state to use one when needed but to find when you need one it's unreachable would be a downer.

[Michael Rolls]

Very true

[muddy]

Half the time I can't see on my mobile because of the black screen and the fact I have to unlock it every time .

[klondike]

Millions do manage to use them. Well billions actually.

[CHF]

My button stays on at all times; they are waterproof. 
I press it once in a while to test it, as asked.