My first name's not Andrew, btw.
Plus, I don't live in Barrhaven, but in Centrepointe.
Now onto your questions.
The valence is low, but you can replace it with a higher one if you want. Sometimes GM covers the cost, sometimes not I've heard. It's a $60 item. I find just going a bit slower solves the problem most of the time.
I don't find any problems with blind spots. I'm well into middle age and find things are quite good in all respects with the Volt. I'd love it if it were 5 inches longer inside, but you can't have everything.
The mirrors are fine. They're much larger than on my old G8 GT.
Overall, visibility is perfect. And, yes, I do scrape the bottom of my driveway in Centrepointe. If this last fact aggravates me longer term I'll just have the valence replaced with a shorter one.
Hope that helps,
Zete.