PERFORMANCE
This thing works and it works well. By default it's set to an eco mode, which I didn't realize because pretty much 99% of my house was spotless when it was done (not counting unreachable areas). I did end up increasing to medium power, since I own a dog that sheds a lot, which has been working perfectly. The high-power mode is obviously a little better, but it's very loud so in my opinion, not worth the trade-off.
PHONE APP
The phone app has a ton of features. The robot maps out a very basic layout of your house which you can modify by sectioning off rooms, creating no-sweep/no-mop areas, etc. It's actually weirdly fun to fiddle around with these options, and I was quite surprised to see how accurate the map of my apartment turned out to be. You also get a live view of where the robot is on the map when it's cleaning, so if an error code pops up or it does get stuck somewhere you can easily find it. It's also just cool to watch the vacuum do its thing and then see it's position on the map; I followed it around and easily mapped out the different rooms/areas in my apartment this way.
While I do love the app and all the features it provides, it's a little finicky as an actual app. I have the Android version and it's frozen up/crashed a couple of times. But when it works it really does works, the UI is intuitive and it always does communicate my commands to the robot immediately. Still, I hope the app devs iron out the links so it runs better. My partner has the iPhone app and it seems to have the same issues but so far we've mainly used my phone for all of this so I can't really say for sure.
MOP ATTACHMENT/PERFORMANCE
The mop function is...good. Not as fantastic as the vacuum, but still good. I find that the eco mode for the mop is too weak for my hardwood floors, it leaves some streaks on this setting, but it is great on medium (though some circular streaks are inevitable). Just like with the vacuum, the high-power setting is just too loud, and not that much better performance-wise than simply keeping it on medium.
I dislike filling the water chamber with water, it has a very small hole and it's difficult to tell when it's filled to the max, so I always end up overfilling it slightly which is annoying. I wish the chamber were clear-colored to make it more obvious (I also wish the fill hole wasn't like a half-inch wide max in diameter). But the capacity of the very small water tank manages to work for my whole house without issue which is great, I appreciate never having to get up and refill it. The mop pad is easy to clean and the mop attachment comes on and off with a simple click/pull.
CONCLUSION
This little machine has really dramatically improved my life. It can't do everything of course but it can do much much more than I expected to, and now it only takes me a couple of minutes a day to clean the areas that it can't get to. Highly, highly recommend this thing, one of the best purchases I've ever made.