I am at upper intermediate spanish level and wanted to practice/improve my Spanish.Duolingo was easy to use and allowed freedom to jump around the hundreds of lessons that there are, so I subscribed. Then they changed the system and you now have to follow a pre-determined path. So I ended my subscription and discovered that I'm hooked in for another 8 months. I feel ripped off.Also beware that this is Latin American Spanish, not Castilian, so the informal second person plural (i.e. you plural) is not taught.It's a shame as I was quite enjoying Duolingo.