It is for me. I had never realised that sometimes I sleep worse because I feel that my teeth are not clean enough. My breath feels fresher in the morning and that is definitely a pleasant feeling.
Yes it’s important it’s something I know I should do and don’t. It’s simple and easy to achieve. A bit like the water challenge (however I only do it once). Doing other challenges like my secret challenge takes longer to do, and because of that it’s not always achieved. Small things are good to boost your moral esp when you may not have accomplished everything that day. It’s a box to tick, there’s a lot to be said for ticking boxes.