True Kathy, mine is with me 90% of the time, except the aforementioned 'night out' and unfortunately at work, where it would be impossible to take it ;-)
My Mo has to stay in the office in the hospital, and isn't allowed on the ward. But beyond that, he's with me everywhere. Right now, on the table beside me. If he were the nervous sort, he might worry about the proximity of my cup of Earl Grey... fortunately, I'm the neurotic one in this household. Why buy a £500 device and leave it at home?