I bought one a week or so back. It is a lovely piece of kit, the extra screen real estate makes a huge difference. The speakers are what lets its down the most though they sound so weak compared to my Rog Ally and my Steamdeck. But the additional features, the built in stand, the case you get with it. The ability to turn the right stick into a, admittedly weird to use, mouse etc. It just feels like a much better designed overall package than the Ally.
The biggest issue with both this and the Ally is Windows. It really saps most of the resources from these devices, including CPU and Memory. First thing I did, on both of them, was to run Bloatynosy to strip the bloat out of Windows makes quite a big difference to framerates.