i have done two cycles of hst and have gained over 30 lbs in the last three months, however a decent amount of this has been fat, as i hit it coming out of a cutting phase right into bulking. If you have good lifting experience and more importantly a good foundation with conventional methods, then i would def. condone this routine. however if it has been a while since you hit the weights and are just getting back into it, i would get what you can by shocking them with something like the routine you have above for 3-6 weeks and then try hst