It's important to find a trustworthy company when it comes to supplements, and NOW Foods is one of those companies. Their products, including creatine, are reasonably priced - although the price of creatine has skyrocketed across the board. This creatine mixes well with my protein shakes. I personally only take 3 grams daily instead of 5 grams as a 150 lb (68 kg) man.
Creatine is a well-research substance, and the strength/power output benefits are well known. After the initial loading period, you might feel discouraged looking at your scale, but it's all just water, don't worry.
It improves energy and concentration when exercising and helps to increase muscle strength and reduce muscle fatigue.
To achieve best performance, it is recommended to take 4 times per a day with recommended 1 serving size each for the first 7 days.
After 1 week, it is recommended to take 1 time per day before or after exercise.