Saw this book(2009, 235pg) on Taobao, and picked it up. It was a definitely a bit below my level(moving on from Hsk4). According to my SRS, I added less than 50 new words, a few nice ones though. I don't think there was any grammar that was new to me, maybe some slight variations. I did every listening and exercise and still blew through it in two weeks, a unit a day(1 hr a day). I thought it was pretty useful as a review though and could be considered "very" comprehensible input.

I particularly liked the Speaking exercises in every unit, which included prompts to speak about a particular topic as well as role plays. I did all of them on my own, speaking aloud. Another good exercise in each unit requires you to summarize each dialog into a short paragraph, which I did orally(the correct summary is included in the answer key).

There is a volume 2 and I will go ahead and burn through that one as well.