The upsides:

Quick human tech support with timely response throughout the conversation either by email, phone, or video meeting.

Over 100 interesting, dynamic ad templates

Automatic, comprehensive reporting sent directly to clients

1-2 ads sold and you break even on monthly fee

Incredible engagement and clicks on some of the ad zones (billboard, pop-out/sneaker, leaderboard)

The amazing cube is a game-changer template.

You can design an ad in the platform and send client an example of the ad, plus a link to preview how it looks on the page (before going live)

This is a bazillion times easier than using Google ads or Adsense Review collected by and hosted on G2.com.

Downsides (but they won't make me leave):

Learning curve is slow. There is simply too much to learn at one or two onboarding sessions. You think you know it all and then something comes up that is just not intuitive.

It is very hard to explain to potential clients. You almost have to decide which two or three formats to offer to them. It is impossible to say, here are the 109 choices that you have, which one do you want. And there are so many great choices.

Starting/stopping campaigns vs switching out artwork can be confusing. Review collected by and hosted on G2.com.