I have a reasonably fast DL speed of 550+Mbps. I took me just over 4 hours to download MS2020 including the 90G 'update'. I am a pilot (commercial/IFR/former CFI) and while I think the scenery, visuals (clouds!), A/C, multiplayer integration as well as how they did the ATS communications are generally 5 star, I'm still not 100% convinced the flight model is better than X-Plane 11. It's not bad by any means, but I'm still tweaking my controllers to make a fair assessment. However, overall first impression is simply, Wow! Nice job MS!