Bob wants to know if it's safe to upgrade to iOS 11. Leo says it is, and not only that, but iOS 12 will be released next week along with macOS Mojave. Leo adds that iOS 11 was a really bad update, and even though there's been several fixes and updates to improve it, there's still a lot of shortcomings with it.
Dana is having issues with his calendar after updating to iOS 11. Leo says that Apple's quality control has lapsed so much that they're shipping iOS with obvious issues and he's just going to have to wait until Apple gets around to fixing it in an update. Leo also recommends abandoning the Apple Calendar altogether and using Google Calendar. It's got all the features as Apple Calendar.
Rob is a professional photographer and he wants to use an iPad Pro to capture his images from his camera. Leo says that there are shortcomings here, because the camera connection kit by Apple doesn't really work well, and the iPad can't read RAW files. So he'll have to look at JPEG images. That's why Leo gave up on it. Canon has an iOS app that would enable him to wirelessly transmit photos to his iPad if his camera has wireless capability. It works quite well. The only other option would be to use his Mac and then copy the photos over from there.
Barbara has an iPhone 5S that keeps bugging her to install iOS 11. Should she? Leo says if Apple thinks it can run it, then she can run it. Security improvements are a good benefit. Also, some apps may not run without it. But the reviews say it will slow it down. It will still be faster than an iPhone 5 running iOS 10, though. So she should go ahead. It'll be usable. She should check out this article at arstechnica.com.