Floortime-DIR/Intensive Interaction experiences?

I’m trying to find out more about the Floortime-DIR approach. (It’s a therapy mostly used for autism). 

I’m also trying to find out more about Intensive Interaction, which seems to be at least somewhat similar.

I haven’t been able to find anything written by people who have experienced either approach as a client.

Have any of y’all received either Floortime-DIR or Intensive Interaction therapy? If so, would any of y’all be willing to talk to me about your experiences?