It's nice they give you an instant quote, but they don't give enough info for me to be willing to take the next step.
Basic things like:
What is the physical size of the quoted panels?
The KW rating they give, is that actual power delivered, or rated power?
If rated power, how much actual power would they expect given my geographical location, and angle of roof.
How much of the roof are they covering?
They want $100 for the next step - presumably I would get those answers then, but I'm not willing to risk $100 without knowing more.