I'm almost past the honey-moon phase, but I can already say that I love the Milaana. It works really well, and coming from the Zion and Firewood 2.1, it's super easy to use.
It does require more attention than the Zion, it's a wilder beast. But I don't set my Zion to 100% either. I think the Mi is like a Zi stuck to about 90% and without the comfort of the voltage regulation, and a lower (but not dramatic) battery life. On the other hand it's way more portable, despite being not fully contained.
The Mi feels considerably hotter with the short stem, but not unusably hot like my Firewood with its stock stem. I clearly prefer the Zion and the longest stem for taste and vapor quality/coolness (I think these three concepts are completely related, the hotter the worse the taste)
The Mi taste is also often less good because of human errors: the button timing must be tight, a single off-beat and you get to higher temps and you can get uneven roasting, spoiling the taste. I find that I need to stir at least once during my session, where I never stir with the Zion. But everytime it's because I wasn't cautious and got a tad too high in temperature.
I used the Mi a lot at home in order to test it, but I prefer the Zion in this setup. Now on the go and outside, the Mi is my first choice now, without hesitation. I also use the Project by Pipes but it's not perfect for now, and I enjoy it less than the Mi. I still grab my conduction vapes when I want to have a longer and less intense session, as both the Mi and Zi are uber violent! I keep saying it, but these guys hit super strong, they remind me my first joints and my first trips to Amsterdam.