It is a completely trash boosting service. Be aware! I took my order, while it said the averaging finishing time is 2 days, and it really took more than a week, some boosters are seriously terrible players that have a very low win rate, and none of them is trying to finish in time. They just play whenever they want to play. And choosing roles is useless, because they just play what champion they want to play.
Do not trust those 5-star reviews, they are lies.