The fact that is no user upgradable, is a big turn off. i bought my first apple a macbook pro in 2012 it was extremely slow, until after i installed more memory and swap the hard drive for ssd. Now apple decided to make this machines not user upgradable, if you need more memory or a bigger hard drive you have to pay more than double what you will spend making the upgrade your self, and you have to decide it at the time of purchase. Greed I suppose. Any way the M1 chip on this machine is a big improvement in speed, and so far I am very please with it. And something else, for the initial set up is better if you have a wired keyboard available, it can be done with a wireless keyboard but you will have to Google it to find the instructions because Apple doesn't include a guide on how to do it.