In my last job records show thaf I fitted more than two thousand keysafes. Breaking into property was something I did on a daily basis. What I can say is that you should be worried if you fit one of the cheap ones. The ones shown earlier in this thread would keep me out for less than one second, I can easily open them with just one blow, very rarely did it take a second blow.
There is only one really good keysafe available in the
UK .. chancers wont open it and even with the right tools, it is still a handfull.
Amazon.com User Recommendation
If I had to break into a house and I seen one of these fitted in the doorway, I would ignore it and carry on and get straight through the front door. They are very difficult to open unless you are kitted out to do so.
Most people dont realise that the easiest way to break into their house is through the front door, especially if it has a UPVC door with a Euro lock and a multi locking system.