I tracked in excel all throughout graduate school and, in hindsight, regret it. It was a real pain to transfer all that info into time2track, which I found was almost necessary for internship applications (it does a lot of handy things like break your hours down into location, adult/child patients, supervision, etc.). There were also a lot of things I didn't think to track (like my client's ethnicity and support hours) that you end up getting ask in the APPIC application for internship. It's just a ton of info to track in excel and the summaries time2track will give you will be worth the pretty reasonable yearly cost.