I use Gmail all the time on my Android smartphone. The latest update is v2.3.5 and it allows you to sync only important mail like your priority inbox to reduce data usage and save battery life. It also allows you to customize notifications for Inbox and other labels. These are nice enhancements since we're now living in an era where data plans have limits (unless you've grandfathered your unlimited data plan, but then you won't get Wi-Fi Mobile Hotspot unless you switch to a limited data plan).
In any case, I find that Gmail is a very robust email service and I have several different email addresses that all converge to a single Gmail account. It certainly simplifies my life.