Looks like this forum is not used very much, but I'll give it a try anyway. I'm nearing the end of Spanish level 4 in preparation for my immersion week in Mexico City in January. I've been working with the app consistently, usually at least an hour a day. Recently, I'm feeling more and more sluggish mentally, like my brain is an overpacked suitcase and if I try to stuff any more things into it, it's going to burst. Any of you fellow learners experience this? I suppose the rational course of action is to take some time off, but I'm afraid of forgetting what I've already learned. Yes, definitely a champagne problem, but just curious if anyone else has experienced the same in working through the Fluenz levels.