They are good for scaring the pants off of people sometimes, aren't they?! I've been involved in a home attack before, so I'm a very cautious person. I'm usually home alone with the baby 2 days a week for 12+ hours. During maternity leave, it was 5 days a week, 12 hours a day for 3.5 months. I will say it definitely made me feel a lot better to have her around (that, and the alarms, and the pepper mace too!).
When Mila was a pup and had real issues with overexcitement at the door with guests, I used to have to put her in her room before I could go the door. But as soon as I got that behavior under control, she came up to the door with me. She never barks, but I have trained her to speak on command, so as I come up to the door with her, I'll tell her to speak. Then I make sure she's right next to me as I hold her collar when I open the door.
I haven't had any scary people come up to our door yet, but she did do me a big favor by getting rid of this pair of JWs that used to always come up to my door at all hours of the day and ring the bell. EVERY.SINGLE.TIME, they just happened to come over right after I had put Rowan down for a nap and he would of course wake up screaming. Even when I scolded them for this, they still continued coming back.
You can bet your heiny that as soon as I was able to, I brought her with me to greet these two. Needless to say, they have finally left us alone since then. Go Mila May!