I have been using Vibum for over three years now. During this time, I have left and returned several times. There are practically no alternatives on the market. I'll start with the positives. Moderation is quick, and views appear fairly fast as well. The technical support is top-notch. Payment is convenient, settings are simple, and reports are clear. Now for the negatives. This is not a magic button for promoting a channel. You can't just invest money and expect to get 100,000 subscribers in a month. Interest-based targeting is absent unless you reach out to support. You also can't add social networks without a request to support. It seems these features are only available to large clients or those who specifically ask for them. The depth of views is about the same as in Google Ads Discovery, meaning it's low. Why did I give it 5 stars? First of all, they are slightly better than others. Sometimes significantly better. Many similar systems have even worse results for the same price, and I've tried almost all of them. There are cheaper options, but they just show numbers on the counter. Secondly, when compared to Google Ads, Vibum performs not much worse in the long run. I use them alongside Google Ads. Google Ads is a real headache, but that's another story. In conclusion: not perfect, but quite acceptable. If you launch without targeting, the results will be the same as in Google Ads. If you set up targeting correctly, good results can be achieved. Example in the picture.