Yeah they do as long you take care of them. I find that when it's sew in it doesn't last as long, the hair is more prone to matting and tangling. When it's on a u-part or when it's clip-ins, I am able to take better care of it. I heard YouTuber state the same when it comes to Kinky-Curly extensions.
It's not meant to last long as a sew in.
I had this back in 2015 and liked it as a u-part or you can make your own clip-ins
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Check out the reviews, the girls showed pics of how they rocked it
Check out her channel for blending your hair with these extensions