Yup, suffering will end when you reach Nirvana. And the noble path is just a tool that is designed to assist you in reaching Nirvana. Theoretically, you can reach Nirvana completely by yourself (after all Buddha reached it somehow) however since it is thought to be hard, numerous "manuals" have been developed to help people and noble path is one of the core "manuals". However everything is optional, the main and the only thing that can bring you to Nirvana is your mind and your thoughts.
It will definitely ends life cycles (Samara).
If we think life cycles are sufferings, then it will end sufferings.
Eightfold path works by differentiating mind and physical body.
PS
Life runs in cycles because biological energy (physical)can only last a life span.
At the end of it, mind needs to find another physical energy that can sustain another life time.
Try it. See if it "does it" for you. No, I'm not trying to be facetious. The Buddha taught that one should only believe ones own direct experience.
Therefore ... find a good teacher, follow the practice as your teacher instructs you. After 10 years, you should definitely know if you are on the right track. I'm not sure if there are "guarantees". I'm sure factors such as how much effort you put into it, how skilled your teacher is, etc, will impact your results ... I only know it is bringing results for me.
Yes, the Noble Eightfold Path does work for the individual seeking to end suffer ring to attain the greatest level of happiness, Nirvana. "Gautama Buddha's way to truth was through the question of suffering. What is it? How does it arise? Can it be ended? How can we end it? When other spiritual teachers and philosophers asked The Buddha to describe his teaching, he would answer: "I teach one thing and one thing only; suffering and the end of suffering." After his enlightenment, he formulated The Four Noble Truths and The Noble Eightfold Path. The Buddha was simply a human being and never claimed to be more than that. He was not the incarnation of god or a prophet of god. All of his insight he attributed to his own effort and intelligence. He believed that all doctrine should be questioned, even The Buddha?s. Buddhism is more of a path for the individual to travel, than a faith or belief. The central tenants of Buddhism are the Four Noble Truths and The Noble Eightfold Path, for they are the very foundation of Buddhism. The first is translated as The Noble Truth of Suffering: Dukkha/Suffering. Dukkha connotes not just suffering, but also impermanence, and insubstantially. The Second Noble Truth is the arising of Gurkha ? man?s desire or craving. This thirst or attachment is not only for wealth, power, and sense-pleasures, but can also manifest itself in attachment to ideas, opinions, theories and beliefs. The Third Noble Truth is - The Cessation of Dukkha ? that if one eliminates the root cause of Gurkha, which is craving/thirst, there ensures a liberation or emancipation which is known as Nirvana. The Fourth Noble Truth is the way or path that leads to Nirvana. It rejects the two extremes of sense pleasure and asceticism to follow a Middle Path. The path can be categorized as follows: Right View, Right Thoughts, Right Speech, Right Action {includes the Five Precepts), Right Livelihood, Right Effort, Right Mindfulness and Right Concentration. *'Meditation is an important aspect of Buddhism. Meditation in Buddhism has two purposes. The first step is to develop mental concentration. The second is to gain ?Insight? into the nature of things through 'mindfulness, awareness, vigilance and observation'. When a Buddhist practices mindfulness meditation, he meditates on Anica (impermanence), Gurkha (suffering), and Anetta (non-self), using the breath as an anchor. *If you wish to gain more insight into Buddhism and its teachings read: "What the Buddha Taught: Revised and Expanded Edition with Texts from Suttas and Dhammapada." -By: Walpola Rahula.
Why would someone who use a nickname regarding R&S user being "stupid" ask a question ?
Is the questioner "stupid" ?, or is the answerer 'stupid" ? or the silent viewer "stupid" ?
Ultimately, it is the question about what is really "stupid" ?
"stupid" is a cognition of a being about itself being more superior in intelligence than another being's intelligence.
This superiority complex thus result in the idea of the individual being's ability to feel smarter, can foresee event, control physical resources better than the other, ultimately leading to inequality, and its consequences.
All are equal, regardless of intelligence for you cannot outsmart the cycle of life and death, till you reach ultimate enlightenment.