GTp just as other companys is too cheap of a company to make T400 using the proper weight esters and BA.....BB...or just overall quality. I HAVE DONE THE SAME AS TUX...MADE 600 NOT 400 MG CYP, ENTHANATE, DECAONATE, before with zero pain.
From my experiences, arms swelled up all red, debilatating pain, couldnt walk for 5 days, severe rash and numbness, water developed in arm and leaked ( inside down to elbow).
Only way i got thru it was mixing it with over 75% oil. That is pointless and defeats its purpose.
I know i will NEVER use any of their products. They fucked up once for me that is enough. When i fu** up someones job in real life i get no second chances...business is business.
If you want to us ethem..it syour choice....to each his own. Results with it are good though.