I have been a Nintendo fan since 2007, when I first got my DS Lite, so I might be biased.
Regardless, this is an awesome console that supports most of my favourite games, such as Super Mario 3D Land/Pokémon Ultra Sun and Moon/Bravely Default and Bravely Second/Professor Layton and the Miracle Mask/the entire mainline Ace Attorney experience/Legend of Zelda: A Link Between Worlds. It also natively supports DS games, so things like ŌkamiDen and Pokémon Black/White 2 still function perfectly well, minus any Wi-Fi connectivity (the servers for DS games went down years ago).
Unlike the 2DS line of consoles, this does indeed have stereoscopic 3D, which in my honest opinion is a major boon; any game that supports it also generally looks better with it enabled. Heck, when I turn it off, things just look so flat and lifeless in comparison to full-3D, so I never actually do turn it off. This is why I will never like the 2DS, even if it does have a more convenient micro-SD card slot; here, on the New 3DS XL, the slot's hidden behind the back cover plate, next to the battery, which means you need a small screwdriver to access it. Meanwhile, to what I understand, the New 2DS XL has the slot for it on the side - like how the regular 3DS had its SD card slot on the side.
Continuing on from the stereoscopic 3D topic, several games work better with it enabled - the main one I know of being Super Mario 3D Land, due to some secret areas using it to reveal illusions (for example, a square made out of blocks might actually have one side much closer to the camera than the rest, or what seems like overlapping clouds might actually be placed in different places in the X/Z planes). Certainly, not every game uses it for this purpose, but it's definitely a really nice touch permanently lost on the 2DS line.
However, Miiverse is dead, so that aspect of the New 3DS XL is useless; the official chargers wear out quite quickly, in my experience, so third-party USB cables are better; unlike the Switch, this console's not region-free (unless you install homebrew), so imported games are almost definitely not going to work.
Homebrew for this console is quite easy to install, however, and provides plenty of features - removing the region lock, local save backup, custom themes, maxing out Play Coins, allowing for cheat menus and full-on mods (e.g. Pokémon Supernova Sun, a mod for Pokémon Ultra Sun), and more. This is definitely a major plus in my book.
This is also the last console of Nintendo's to feature backwards-compatibility and to actually fit in a pocket, so...