I do not use this sort of app usually as most interfaces are too annoying. This one is so simple and elegant, I enjoy using it. Not just for work (I work as a freelancer so tracking time on different projects is important) but also to track personal activities I want to do more of. I love how I can use it from any of my devices, I love the reporting, and export to csv is perfect for my time sheet and invoicing. Tracking is already beginning to change how I think and work. Fewer distractions as I know the clock is ticking, and motivation to increase the number of logged hours for work, exercise and even sleep. This small app could literally change my life (cant believe Im saying that...) Granted, I only started to use it a few days ago, but for the moment I havent noticed any real bugs.