I have been using this for over a year now and find it to be spot on. Having just changed phones I emailed CamerAlert in the evening to change my details and the following morning it had been done. An excellent product with excellent back up.
CBRonda, iPhone
Does what it says on the tin. Needs an annual subscription OR you need to get a lifetime membership for free by submitting a new or changed camera.
Well worth the app price and the annual subscription!