Low cost that made me a bit wondering

The price is so low that I wondered if this was real, but it turned out as just very high value. I am suppose the tefl companies must be very competing as I did see a few adverts for very low courses. I choose this because the reviews and chatgpt said it was reliable and of good quality. My experience is it was very good and the staff were very helpful. I had some questions and a small login problem that they answered quickly. For learning, the quizzes were medium hard but everything is natural for understanding how I should complete it. The videos were also helpful though the voices are sometimes digital. I think this is normal maybe now? I think the quality was very high for the price I paid and I have my certificate after just 2 hours from my course finish.