I have this exact pair. (same retailer even) and they're wonderful, not to mention they feel softer on the eye than a lot of contacts I've used.
Visibility... it's like your walking through fog. You can see pretty well (though the darker it gets the better you see and conversely the brighter it is the harder it is to see) I wouldn't recommend them if your going to be doing anything delicate, but for just normal con-going I think they'd be fine, just expect your distance vision to suffer a bit (like I said, its almost like going through fog)
'Bring peace to the lost lamb, grant rest to the fangs of the wolf, and deliver the Hammer of God unto the Devil', - Sister Rosette Christopher, Chrno Crusade
"The bad news is he ended up building the whole rock tower... the good news *gulp* I have a rock tower to knock down..." - Rainbow Dash, My Little Pony: Fiendship is Magic (S03E09)