Yes, I've been using model comparison tool. But I have few questions.
When I compare models, last click is always the best in my case, but recommendations are completely different. Should I ignore it?
If I've seen that Impressions are better then click like interaction type, should I create (or increase ratio) impressions campaign?
Also, when you compere some models, do you usually test models on type of traffic, or you compere some campaigns, or goals?
Also, if I exclude direct traffic from last step, I would automatically have better results from other sources, but in reality you would have the same ratio of direct traffic because you can't directly increase or decrease it. I don't understand that.