Trigger Leads

Pros

You're getting info on people who were physically out shopping for a vehicle within the last 24 hours as opposed to something from the internet, where some people aren't even in the market for a vehicle.
Info is fresh and accurate.
Some companies offer vanity websites and 24/7 live operators to help in contacting the leads.
Some companies offer customized mail pieces as a secondary form of contact with leads.
Leads received are exclusive
Very affordable
You can contact 5 times the amount of people for the same price as 1 internet lead.
Leads can be filtered based on location, credit score, income, age, etc.

You occasionally run into people who have already bought.
Not all phone numbers received are accurate.
If you're in a rural area the availability of leads might not be that great.
You do not get a full credit application like you would with a lead from the internet.
You need to have someone dedicated to calling and setting appointments. For dealerships who are short-staffed this may be an issue.