We've just signed up for a free trial and my boys are really enjoying it. My older son got up early today to do his next level that was unlocked. He keeps telling me all the new things he learned in social studies and science. He said that the math subject is challenging enough to keep him interested. I'm heavily pregnant and lack of energy at the moment. So this type of activity is great for me too because kids keep themselves busy and I have no guilt of them spending time in front of a screen. I've also did a bit of research today because I'm considering to commit to 3-4 classes for my kids and saw some negative review about the company. Knowing that reviews can be unfair sometimes I contacted their customer service to address my concern. The customer service responded pretty much straight away with a very professional email.