Not happy. I had MS Project Professional Desktop. Didn't like when they switched to subscription only services. Now, no notice that MS Project was going away and that they were going to use Planner. Got a new laptop and purchased Office 365. Opened MS Project online and it states that it is no longer supported and that I now have to use planner. Purchased the premium planner 3 and still am unable to open any existing *.mpp files. No place to select to open. No place to select to import. I basically have to completely start over writing the project plan when we are in the middle of a project. VERY UNHAPPY! I recommend getting the free Project Plan 365 app (I don't think it is a Microsoft product but I can open and work on my existing project plans! And it is FREE!!!!