I just finished the 120-hour course with a virtual weekend class, and the virtual weekend class was by far the best part of the experience. I haven't taken any other TEFL certificates to compare this to, but the course materials are unnecessarily long-winded, occasionally contradictory, and scattered with typos. Assignments were confusingly laid out. I felt like I was fighting against the course structure sometimes. They package up short modules like Business English and Large Classes into the larger certificate, but these contain almost no useful information (certainly nothing you can't find from free resources). I wish I hadn't had to sign up for these to get the certificate. The Grammar and Methodology (and some of the Video Observation) modules have a lot of information, albeit laid out in a way that can be hard to take notes from, but I would mostly recommend the live course. You get a chance to deliver a lesson, observe others delivering lessons, and then get real-time feedback from a tutor. I did the live course after completing the asynchronous course, which I would recommend doing, as it gave me the chance to implement the teaching methodology I'd learned.