Overall, I have been using this service from 2016, even till now, I use them to get to my desired rank every season, and my experience with them have been nothing but positive. Look, they may not all be "Masters or Challenger" as they claim but how many players are at that top tier? Its just straight up impossible to help as many customer as they do have with only that many boosters. What I Believe is that they will adjust accordingly to help you and get the wins you need. For example if you place an order from iron 3-gold 1... well lets be real, even a low diamond can get you there. And if you place an order for higher ranks they will use their higher ranked boosters, which I don't fault them for.