I'm still trying to get used to the system - being right handed, I usually carry stuff (say, a small bag of items from the grocery store) in my left hand. The button is easiest to push with your left hand thumb, while gripping the handle, Once it unlocks, just open with same hand. What I wind up doing though is either shifting what I'm carrying from left to right hand, or turning my hand upside down to use button and handle with right hand. Either way, it's a little awkward. And then, if you need to unlock passenger door, it takes two presses of the button to do that, and my timing is way off on that one half the time. I don't get the delay for the second press right and wind up just unlocking from the inside. Unimpressive.
To open the locked lift gate, you have to reach to the right and feel around for the unlock button, press it, then find the latch in the middle to open it. Both are hidden and you have to find by feel.
I'm aware I could skip all that and just use the remote, but most of the time it's buried in my purse and NOT having to dig it out to get in and start the car is what I like best about the feature. So, I continue to stumble around with buttons and handles to avoid doing that.
I would dig it out to open the hatch, though, if it had that feature. I know, difference between 16.5 and 17............
The button for the tail is just off the reversing camera which is approximately in the middle (if that helps you)