Yes, it is visible in just about all sunny conditions. In those cases where the sun is in direct line with the subject, just by looking at the screen at a slight angle will allow you to see the subject in the screen and you can still take the picture. I never had any problems with the sun, either. Hope this helps.
Yes, to some degree. I shot mid morning with no clouds and a bright sun behind me, didn't have much of a problem. And as someone else stated, it is better visibility than an iPhone screen. It is a nice little camera and I am happy with the picture quality.
Much better than most. Like any screen, very bright and very direct sun can be a problem, but a slight angle change and its fine. I use it for Home Inspections so it gets bounced around a lot and its also very sturdy.