Question! Is dieting harder after reaching your target weight?

I've heard a lot of people say that even if you work hard on dieting to reach your target weight, maintaining it is even harder, so I'm curious about this.

Looking at the reviews, some people say that maintaining the weight is much harder than losing it, while others say it is better than expected if you just get your lifestyle habits right.

For those of you who have actually succeeded in dieting, which was harder: losing weight or maintaining it? If you have any tips on maintaining it without the yo-yo effect, please share them too! :)