I also invested in the project (not a big amount though) and trust me right now I am not that happy with my investment. I think I will hold DOOH tokens for a couple more months and then I will sell them if I don't see anything positive.
Yes, already they are doing their best to get a reputation in the market because most of the people are waiting for the more screens in the market in order to get a reputation and at the same time we need to wait for their developments to get more partnerships around the globe. We need to give some time to them in order to get more exposure for this project and very soon they are going to enter into a very good market with the vision they have.