Sharmaine is a very sweet woman, it's important to note that you'll be sharing the inside of the house and bathroom. As others have mentioned there's a few things to keep in mind with that, I've read some other reviews and it's really not that hard or big of a deal to get into the house and follow the key rules. Sharmaine has done a good job to let you know how to use which key, etc.
As far as location this is so close to the airport which is great, if you're worried about a lack of ability to lock the door to the room you're in that could be a concern. I felt safe here in this area, and the back gate does lock; just bare in mind that you can't lock your sleeping arrangements from the outside only on the inside so either bring your stuff with you or perhaps you could ask Sharmaine if you can leave it on the inside somewhere.
I wasn't here much longer than one night, but Sharmaine was courteous and a great communicator.