I have been able to keep track of my clients through their oxygen use with this system. The only thing I dislike about it is how slow some parts can be, especially when adding new users or entering data for existing ones. This has not impacted our business much as we do not add many users at one time but if there were more than 5-10 people using the app simultaneously then it would get very sluggish. Tracking oxygen usage so I know what levels each client needs and keeping up with them while seeing where they need help most.