I have had the Quadzilla Scout in my truck for a little while now. The equipment works fine, that is not the issue. It is the fact that they (as a company) are just shady.
First, the Scout montior just looks and feels cheap. Like something at a discount rack at Auto Zone.
Now, it says that it has a turbo timer. It does not work. You call them only to find out that you have to buy a kit that is not even available yet. When I bought this thing...it said NOTHING about having to buy a extra tubro timer kit that is not even available yet. No "I'm sorry" or anything like that, only that it MIGHT be available this summer.
Next issue I had with them had to do with a "fuel rail pressure kit." When I ordered it (direct from them) I told them that I was running a Scout and they knew the year of my truck. What they sent me was a fuel pressure kit not for the rail. I called them and told them that they sent me the wrong one. They said they did not. They proceeded to explain like the Scout does not monitor rail pressure. So I got something that I did not need.
I told them I am sure happy that it has a barometer. That is way more important then a turbo timer or rail pressure.