Is it worth using Advertmobile to promote applications?

Question

Android

Among the promotion services on the forums, Advertmobile was advised.
Has anyone worked with him?
Interested in whether there can be bad consequences for the promotion in the end.
Conversely, if you can share a success story, go ahead.

Answer 1

For now, I will answer this question myself.
Started using it and it works. If there are problems - I will describe in the following comments.
And now in detail:
They promised that the percentage of customers who stay (do not delete the app immediately after installation) is from 5 to 50% depending on the category and on the application itself. I have about 20% (music category).
So far I have nothing bad to say. Support is normal and relatively fast.