Also you can write a note while talking on the phone or not with tons of info that will trigger you phone to to several things automatically.
You can write down a name, phone number address, email address, save it. Tap on one section to make it add to or create a contact automatically. Tapping on the email address will pull up the email app with their email address in automatically. They physical address will pull up maps, enter the assess and you just have to hit "start navigation. Tapping on the phone number will open your dialer with the number there and you hit send. That is really good for writing down info that you will need but don't want to make them a contact and will only need once or twice.
If you need to call someone back once you just tap that info and call them. You don't have to write the info on paper and then manually dial it later. Same with an address. You write it down instead of sending yourself a text or writing on paper and then entering it into maps manually.
One feature of the notes that I liked and they removed, I think in the Note 4 and hopefully they being back.. When you are on a phone call and pull out the spen, it would bring up that action note automatically. When you save it and go back and look in your call log, there would be an icon shortcut for that particular note attached to the phone call, whether it was a contact on your phone or not. So if you didn't remember what you saved a note as or what day you did it and needed the note, look in your call log. For a call to John Doe last Friday, you took a note, but talked to him every day after, you scroll through the call log for him and you see the icon for the note by the call last Friday and tap it and open it.
I really liked having the notes saved in the call log because even if I called some store and I didn't remember the number, I could scroll through my call log for that day and find the note quickly.