I think I spent most of my time working on the PS. The application itself isn't really all that time intensive. I started working on it early and then did a little of it whenever I had down time. Overall, it probably takes 5-6 hours to complete the application. But, if you do it over several days, you can look back over it with a different mind set and improve it. To actually click all the programs to apply to can also take a couple of hours (depending on the number). It's kind of a pain, since you have to select your USMLE score release, LORs, PS, tracks and whatever else for every program. My recollection is that the ERAS application overall took very little time... the PS was a different story.