I'm a believer in the benefit of your body's natural GH which is perfect and has a number of benefits over synthetic GH. It's been shown that you can produce a high level of natural GH by using 100mcg each of Mod GRF/GHRP 3-4x per day, or every 3 hours. As already stated, I would recommend spending some weeks reading through datbtru's thread.
It seems to be true that you can create a pulse with peptides and then add inject synthetic GH to further amplify it and your body will read it as part of a natural pulse, therefore not resulting in the usual negative feedback. This is how I use GH with my peptides PWO or pre-bed on hard training days.