When Palm and Blackberry used to send me devices for review, I found it both enjoyable, yet extremely frustrating. The reason for this was the fact that the easiest way for me to test these devices was using them as my primary cell. The one thing that new hardware and new software have in common is unpredictable issues. Apple cannot deny that Android has newer technology sooner. Many of the features just now coming out on the new Apple models like facial recognition and OLED screen technology are not new to Android. That being said, APPLE iOS is far more secure and less likely to cause problems.
Apple's been beta testing iOS11 and is convinced it is ready for primetime. Unless you are getting paid to beta test it, I'd advice sitting back for a week or so and doing Google searches like the one I did above. I did the above search within 48 hours of the release so it's too soon to know what the issues are. Obviously, battery issues are one of the issues that is showing up immediately. Since there are millions of third party applications, it's impossible to immediately know how well this software plays with all of them. Many of my colleagues at CNET, BGR, Engadget, PC-Mag, MacWorld, and others do a great job reviewing products and software so I know longer have to personally.
Joel Saltzman has over twenty years of wireless industry experience. He is currently CEO and Chief Wireless Analyst for Dr Wireless.