We haven't had a good track record against backup quarterbacks. I remember how the Giants took it to us with Colt McCoy a couple years back. Nick Foles beat us with an inferior Bears team last season.
Andy Dalton has played a lot of football for multiple teams and did a commendable job last week in the Saints loss to a good Vikings team (they literally lost by a couple of bad bounces). Dalton was 20-28 for 227 yards, 1 TD 0 INT. Not MVP numbers but it shows that he has a good grasp of their offense.
I find no sense of comfort or reassurance in the quarterback we're facing this weekend, especially with our horrid defense.