I have buy boost from Plat V to Plat IV on the last saturday.
He has begin to boost yesterday, I will feedback after the boost
Edit : 18 games, 7 loses, then no LP wins and decrease of my MMR BUT he explains to me that he has some problems then he can't done my boost and refund me.
Bad luck for me but he is a nice person. Not a scammer. I really think if he is I a good condition, he cans boost seriously.