I've had the best customer experience ever with @maticrobots — a year ago when I first purchased it, my mop would constantly clog up the little plastic filter, so much so I just stopped using the mop function.
Matic emailed me proactively "A Quick Check-in About your Matic's Mopping performance" with some tips on how to clean it and I replied describing my issues from our Florida sand making it clog basically every day.
They sent me a new filter prototype after a couple days which fixed my problem—just last week I got another one shipped to me that works even better with a newer design. All for free, all without even asking.
Another example from a month or two ago: I broke the lid by accident (my fault), I asked to purchase a replacement lid, they said they would fix it for free if I sent it in, I ship it in but they end up just shipping me a new unit for free with extra cleaning supplies included. Incredible customer service!