As for complaints, my main one is that there isn't much to either of them here besides liking each other, especially on Kushina's part. There are some nice flashbacks to her talking with Mito Uzumaki, the prior jinchuriki for Kurama, though they get a little repetitive with Mito saying the same thing over and over again. On a much, much smaller gripe, the story is set sometime before Minato became the mentor of Kakashi, Rin, and Obito. I would've liked to see the four of them interact a little, although their absence is more of an "I wish" than an "I dislike."
Other than those two details, I'd still recommend reading this for yourself. It's very cute, and I hope Kishimoto does more of these one-shots for characters in the future. Personally, I'd like to see one about the Great Shinobi Three, and maybe a lighthearted one about Might Guy and Kakashi's rivalry. Also, since I thought the romance was cute, I'd love to see a Naruto-Hinata one-shot set between the events of Naruto and Boruto.
