Thanks everyone! I'm very excited.
I was afraid that it would be wobbly at low speed or hard to control, but its not too twitchy at all.
I could not ride it around the hairpin turn on the GWB walk/bikeway, but it is an incredibly tight turn. I'm not sure bikes were considered when they made it as I have ever seen anyone actually go around it without putting a foot down or grabbing the railing.
Large bumps in the pavement (like 1/2" or more) are rougher than the big bikes.
They are so cool!
I rode to the grocery store this evening, after it has been raining all day, and my pants & shoes were totally dry.
Yaay!