I use some Google apps on my iPhone/iPad and a couple on my Mac. Google's about marketing/ads - I like their connectivity to businesses, that they're mapping/aerial data is pretty decent, and that they progressively update most of their apps and data behind the apps. I use two Gmail account for "junk", and sometimes log in to those accounts in their Maps (iOS app and web portal), Google Earth (iOS and now-free Pro version, even tho' I wish Keyhole was still running that show...), and Google Voice/Hangouts.
Apple and Google, combined, offer services to us that were basically not imaginable 20 years ago. The navigation DVD in my Benz is incomplete and based on data that's months old from a company owned by TomTom (Teleatlas) - and DVD updates cost $300, and the latest one is surely already out-of-date already. To heck with that...
Off-topic but IMHO related, I got a call from a friend in rural WA State a couple of months ago, telling me that there were cars with cameras on them with "Bing" plastered all over them; the maps and business data shown on Bing's "preview mapping site" blow away Apple's and Google's current offerings (including street view). I use Outlook.com, and I already like it better than Gmail for use and customizability, including real alias support. I get 1TB of storage with my Office 365 Home account plus the entire Office suite. The Outlook iOS app gets better by the week. Google's "services" are starting of looking weak when compared to what MS is starting to throw down. I'll keep using Google, and they'll keep using me - on my iOS devices, that is...