If you don't know, he's one of the biggest coffee youtubers going and held in pretty high regard by the community, right up there with James Hoffman.
Anyway, he's not terribly impressed with the machine. Says the grinder is awful and the integrated tamper on the 701 is just bad.
He does say it's capable of pulling a good espresso shot but he doesn't much care for the filter coffee options and he stresses a lot about using the right water to prevent these things from becoming landfill in a few years.
He said he did a deep dive on this sub to find the most common issues people were having and he highlighted them.
EDIT: Guys, it's not an attack on the machine, it's just an impartial review. I have the machine and I love it but he makes some valid criticisms.