Very little, but what I have seen has been encouraging, and he easily has the most upside of any potential options other than buying someone.
I am sticking to my guess that Garoppolo will be the week one starter, but if I had my will, going with a QB with such a high ceiling as Willis would give me the most excitement going into next season. Sure, it might fail miserably, but it might also make the Cardinals relevant again.
To me, whatever LaFleur wants, I am cool with. And if he points at Willis, after getting every possible inside detail from his brother, I am board with that, especially if it is a relatively short contract.