It's great.
If you don't really need the energy boost and just want more sustained and building of vital force, I'd go with a more jing dominant formula, after taking it at the recommended dose I felt like I had excess energy, although I never felt overstimulated, it was smooth.
Really I wasn't doing enough stretching to allow the energy to flow so it overall was my fault.
It's important to under how energy moves in the body so we can evaluate things with clarity.
.great formula!!!!