first one was a pain to setup due to the latest iphone 5 ios update but got it working from the ipad , works well and is handy to have
bought a second one and that was a real pain in the ass to set up took hours and many attempts to get it to work only to find when it was working if i to it out of the room with my router in it stooped working !!!!!!
the company who makes the sensor back up is very good , but i have to return the second sensor to amazon as the company wont take it back themselves , sadly
dont think i will be getting any more , as they are a lot of hassle to set up