For us, the big PITA with keyless is that my wife constantly leaves hers in her bag which she will occasionally leave in the car when we run errands - and then I can't get the car to lock - until she digs it out. The worst was when it first happened. I had picked her up at the airport, she had left the fob in one of her suitcases, we had to run to my in-laws for an emergency, so she stayed there with them and one of her suitcases, while my daughter and i made the 200+ km trip back to our house. Of course I had the other suitcase in the car with the fob. I thought the system was broken until we figured out that she'd left it in the suitcase that I had. Thankfully Japan is generally safe enough that my kid and I were able to leave the car unlocked at the rest areas.