Find your friends
Nearby Friends lets you see which friends are nearby so you can potentially meet up. Using GPS, it shows the approximate location of your friends, grouped by city. It's similar to Apple's Find My Friends feature, which uses your phone's contacts and GPS to plot your friends and family's location on a map.
In order to use it, you need to enable the feature in the More tab, under Nearby Friends -- Facebook will not automatically turn on this feature for you. You can also turn it on by touching the icon at the top-right of the app, which looks like a person with three lines behind it. That'll open your chat list, and at the top, there's a section for Nearby Friends.
After you've gone through the short setup process, you'll see a list of other friends using Nearby Friends, and their approximate locations. It'll say what city they're in and a general location, such as a neighborhood, if available. You'll see how far away, in miles, they are from you, and how long ago, in minutes, they were in that area.
Great experience on the iPad
Last year the iPad version was redesigned with more thought toward how iPad users consume content. The main News Feed has more white space, less dividers, and standardized fonts that are more easily readable on the larger screen.
The Facebook app takes into account the larger viewing area on the iPad, displaying stories in your News Feed with larger images and more text than you'll find in the iPhone version. What results is not a sea-change for iPad users, but simply a cleaner, more efficient use of space to take advantage of the larger iPad screen.
Facebook removed all instant messaging features from the main app, forcing you to use its separate Messenger app to chat with your friends. There is still a tab for your message inbox in the app, but you if you open it, you can only see a page telling you that you'll need to download Facebook Messenger to send or receive messages on your phone.
Also, if you use Facebook's Wi-Fi calling, you can no longer do that from the Facebook app and will need to download Messenger.
The Facebook app offers a smooth experience for browsing the social-networking site on the go. With an intuitive interface; a sleeker, more efficient design that takes advantage of the larger screen on the iPad; the power to make free calls over Wi-Fi and new ways to share photos, this is the best version of the app yet.
With that said, Messages is now a separate app that's fine as a chat client, but not exactly convenient if you need to open a separate app to communicate. It also means that when you're done chatting, you'll need to reopen the Facebook app to continue browsing.
Still, even with the inconveniences the messaging portion of the app causes, the official Facebook app is great for browsing your friends statuses and posting your own. If you like Facebook, the official app is still the best way to stay connected with the social network.