Angelcare movement and sound monitor

[2labs]

Thinking about baby monitors for newborn - do we want one of these things that are supposed to sound an alarm if your baby stops breathing, or are they just exploiting our paranoia and a waste of money?

This is the wotsit: \link{http://www.thetotalbabyshop.com/acatalog/Angelcare_Movement_and_Sound_Monitor_1.html\monitor}

Had a normal sound only monitor for DS1 but borrowed an Angelcare for DS2. Actually, wasn't very impressed with it - we found that everytime DS2 moved to the furthest edge of his cot the thing would go off