I continued with level 2 another week (possibly 2) after that post. I did continue level 1 for another ~month. I also followed the recommendations in re: water, not practicing during lightning, etc. Maybe there were a couple days where I only practiced once instead of twice….
I found level 1 to be very helpful, even after stopping level 2. Unless you fit the short list of contraindications (http://www.qigongchinesehealth.com/fragrant_qigong), there's probably no reason not to do it. (although, I believe one of Master Tian's requirements is the belief that it will work).
To be fair, with every qigong system I've tried that has more than one "level" or form, I've gotten through a gong with the first one, then fizzled shortly into the 2nd one. I am unsure why this is.
After the Fragrant experience, I took almost two months off and have recently restarted practicing Tien Shan. I am quite enjoying it - much different experience than the first time around.