Hey Neville!

Glad you're liking the lessons -- we try to keep mixing things up; just because we had to deal with dry textbooks and language lab cassettes doesn't mean other people should.

Your concerns about level calibration are well taken -- it's an issue of concern here, too, and we'll often get into arguments about whether a given dialogue counts as a hard elementary or an easy intermediate. Obviously, this is something we need to do a better job on, and my hope is that as we continue to upload more lessons in all categories, we'll get a more graceful gradient from E. to I. Thanks for writing in -- this'll give the more reform-minded factions of Popup Chinese some ammo the next time we have a Serious Discussion about it.

Cheers,

--B