A relatively straight forward posture in which, as with tadasana and it's hand/arm vinyasas, we can focus on the breath and movement of the arms but also of the hips.
This is also an excellent posture for engaging the bandhas are lengthening the exhalation in the forward bends which me may choose to stay in for a considerable time.
Vajrasana may also be used as a posture for pranayama and meditation and may be the ideal alternative if you struggle with padmasana (lotus).
NB: These are practice notes that will be tidied up and put into the new edition of my Vinyasa Yoga Practice Book along with the current sequences and subroutines. The book can be freely downloaded HERE. There is a page on Facebook HERE with all the latest sheets and updates. This book is in no way a substitute for Ramaswami's Complete Book of Vinyasa Yoga.