UnshavedSlayer said
Ye it's a solid product. I'm currently stacking MPS with XF hoping for awesome results! =]
Can't wait for your feedback on this man. Historically, Synthagen + X-Factor feedback has been outstanding and I'd particularly like to know what type of training template you're running?
FWIW, loaded stretch position movements (i.e. dumbell pullovers) work exceptionally well when XF is in the mix. Synthagen well, you already know what that does... 
Hope that helps!