I've had these just coming up 2 years now, and they really add a lot to the ambience of my living room.
They integrate perfectly with my Apple Home setup, and I had a great time designing a layout with the app, and then enjoying the satisfying click of snapping the panels into the connectors.
It would have been nice if the app gave measurements for the layout - as it is, I had to work out center lines etc with a pencil and a calculator, but that's pretty minor.
I will also give a shout-out to the support process - I had the controller fail, and I was worried the whole setup was bricked, but I went through the support flow on the website, which automatically just sent me a new controller, which was a 5 second job to install thanks to some clever design. Took a few weeks to arrive (Hong Kong to UAE presumably), but the process was very hassle-free, and I'm back up and running again like they're brand new.
I also love the mounting system - the bit that sticks to the wall snaps into the panels, so you can remove the panels and snap them back in. They're also free to rotate, which gives just enough play to make installation easy. I moved house, and just bought some new mounts - the whole process was a breeze.
Overall I've been super impressed - so much so that I went on to replace all my light bulbs with Nanoleaf ones as well.