I see they have bad reviews, but in my recent experience, right away I started getting my views for YT - and was completed in 24 hours; They do stretch out adding YT subscriptions over a much longer time - but I think that is done to make sure those don't bounce. So far my all my delivered subscriptions are all in place. I did get bonus likes and views due to the momentary boost the added views/subs gives the channel; but that stops after a few days. I don't see any benefits of extra comments at all, and be advised, your videos 'time of viewing' is next to nothing, and hurts videos in YT algorithms based on amount of viewing time per video. But, it is a morale booster finally not seeing your channel with only a few subscribers, and your videos you worked hard on not stuck at a hundred or so views after weeks or months.