Yes everyones reactions and durations will vary based on different bloodchemistrys, metabolism and other drugs used.
I use GH much more then Anabolic Androgenic Steroids (AAS) now, HGH is my all year round base(lower doses). This is because I like the rejuvenating and quality gains attained on it. Also the fact that I have endless suplies of HGH(thats another story)LOL. In general though here are the symtoms you will notice on rhGH: increased appetite, improved libido, improved erections, better skin, nails & hair grows quicker, improved fat loss, improved recovery/healing, rejuvenation of injurys, improved joint mobility, improved bone density, improved stamina, improved lung/oxygen cpacity, improved well being & mood, carpel tunnel, tingling of hands/feet, wetter/sweatear palms(thermogenisis), gyno, water retention, sore joints/hands, hyperglyc.
Note these symtoms & side effects will vary from individual to individual and vary depending on dose. I simply listed all the symptoms that I know of...
The most immediate effect I notice is the increased appetite and increased libido(these are both straight away). I then get the tingling, sore hands/wrists, wet palms, carpel tunnel when I use higher doses.
The muscle gain,fat loss and improved body composition I get after at least 6 weeks. I get immediate fat loss before muscle gain. HGH on its own doesn't make me as heavy as AAS, rather it improves my bodys composition, appearance and gives me a quality look. The longer you can stay on it the better ofcourse because it causes muscle cell division and new cells(steroids dont) and this process requires at least around 2 months. If you use it for less then 2 months you will mainly experience fat loss, improved composition and improved muscle quality.