In case you're not aware, Amiibos are figures that contain a chip in the base that, when scanned into certain Nintendo games, provide bonuses and occasionally unlock features. They're never crucial for completion, but they are nice to have, and a cheaper alternative to more expensive figures on the market.
For this particular incarnation of the titular princess, Zelda's bonuses in the newest game in the series, Breath of the Wild, are shields and the occasional rupee (in-game currency). As said before, they're not needed for completion, but a free shield on occasion is nice.
The figure itself is pretty well-made, capturing the attractive design of the character and a color scheme that's easy on the eyes. My only real gripe is that it's not the most dynamic pose, but she still looks fine.
If you're a fan of the series and/or of the princess herself, I'd say to pick this up. Even if you don't own the newest game, she's a nice addition to anyone's collection.