The C172 is different to other aircraft because the outside view when flat on the ground is tilted up, this can cause some difficulties on landing.
Thankfully though i never had such difficulties. I always feel that after maybe 1 or 2 goes it should come natural to the pilot and instructors also told me this that everything was going perfectly after maybe 1 attempt.
It requires a good feel for the aircraft, you have to be able to see where the wheels are in your mind during the flare, all by the feel of the plane and a good judgment of the height. If you are not good at this naturally it can be a problem.You have to have good judgment of the speed by which you coming down, be able to move the yolk in response, add some power, take away some power. It is not something you can explain really, i just did it. Good luck