if its really tev-tropin then its just as good as any. But they also make a GH derivative, so make sure you read on the package before buying.
Pfizers growth hormone costs around 22$ per unit in the pharmacy in my country, so yeah you might want to look into other brands that cost less without going to the cheapest legitimate brand.
check out my list, if you dont like the tev, then saizen and jintropin would be similar or cheaper but still very trustworthy brands. you can go to their website to cross check a code that is on the box which holds the vials, so youll know if you are being scammed...
http://forums.steroid.com/igf-1-lr3-...gh-brands.html