WATCH A CLASS OR PARTICIPATE?
Many martial arts schools invite prospective students to observe a class before enrolling. While watching can provide some useful insight, I strongly believe that participating in a class is a far better way to evaluate a school.
By actively participating, you experience the instructor's teaching style firsthand, interact with other students, and get a genuine feel for the school's atmosphere, training methods, and overall environment.
Simply observing experienced students performing techniques can sometimes make martial arts appear more intimidating or difficult than it actually is. What looks complicated from the sidelines may be much easier to understand when you are actively involved.
I also recommend avoiding schools that offer only a single trial class. Martial arts training involves many different aspects, including basic techniques, forms, self-defense, physical conditioning, and partner exercises. It is simply impossible to experience everything a school has to offer in one lesson.
A two-week or similar trial program provides a much better opportunity to experience different classes, become comfortable with the instructor and fellow students, and gain a more complete understanding of the school's teaching methods and martial arts style.
Ultimately, choosing a martial arts school is an important decision. Taking the time to participate in several classes will help you determine whether the school, instructor, and training approach are the right fit for you.

