We spent a long weekend at Sandy and Clive's place and we are a family of 4 with a 1 and a 5 year old. The place is just as described. We found it very cosy and comfortable. Some children's books, pencils, toys and a bunch of games are available, and the kitchen has anything you could need with some basic supplies for breakfast. (Yummy plunger coffee) The yard is very lovely as well.
The beds are very comfy with plenty (!) of bedding.
The house is in a quiet neighbourhood, but it is just a 10-15 minute stroll to the center of St. Leonards and the beach. Clive was really nice and gave us local tips as well as letting us borrow two kites to let fly, and while I didn't talk to Sandy personally, she was very quick in responding texts and very hospitable as well.
What's really nice is that the TV has a Chromecast so you can easily watch stuff from your phone/laptop on it.
Would recommend it to anyone :)