They have not let me down

I have received very frequent favourable comments from guests about the cleanliness of the house –  so essential to get a holiday off to the best start. .. In addition, [Tony & Jane] communicate effectively and demonstrate an ability to properly plan ahead to cope with the busy summer Saturdays. They have not let me down in any way during the time they have worked for me, and this is a very important and comforting feature for which I am extremely grateful.