My family's experience with PandaTree has been absolutely wonderful! My son (age 4) and my daughter (age 7) started taking lessons from PandaTree without any prior knowledge of Mandarin and they have both made great progress in learning. The tutors through PandaTree have all been really great! They all have had relevant real world experience with teaching language. They are patient, professional, prompt, and really fun. The PandaTree interface has great lessons. There are songs that help with learning and different modules and badges. For example, my son has been talking about which face parts different drawing of silly monsters have or do not have. The PandaTree interface also has a number of online word games based on your own child's lessons to help with learning in between lessons. The scheduling on PandaTree is also super easy and convenient. We have been able to schedule lessons at all different times of day with different tutors and we have been extremely impressed with everyone we have worked with. I highly recommend this site!