Yes it is. I run HGH year round but usually take 30-60 days off. Depending on my goals, I cycle HGH a little differently. For cutting I usually inject 5-6iu fasted in the AM. When bulking, I run 10-15iu and split the dose (once in the morning, and immediately after workouts).
Only problem with 15ius is you use a lot more product in a shorter time, hence more money.