I can&#x27;t speak for edtechdev, but it certainly has been effective for me. I&#x27;ve dropped about 20kg since christmas through a combination of diet changes and doing HIIT on an exercise bike 2 - 3 times a week. Obviously the diet has the most to do with the weight loss, but over the past 4 months I&#x27;ve gone from barely being able to do 30 seconds high intensity &#x2F; 1:30m low over 20 minutes(total time), to being able to do 1 min high 1 min low at a higher resistance for around 40 minutes.