Not done it yet in a C172, but I have in a PA28. Had to fly off a bit of fuel solo first to get down to maximum weight, but after that everything worked as advertised.
I did have a butt-clenching moment on take-off, where I was convinced that she wasn't going to reach rotate speed in time. Of course the nose lifted in near enough exactly the space the performance charts said it would. Still recommend doing it on a very big runway or with an instructor, just once, so that you know what to expect and don't have that same butt-clenching moment though.
FFF
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