In short: This SSD does a good job despite assembly problems. Detail: KingSpec appears to be buying these devices from a new manufacturer; The SSD I received was marked "Yansen" not "KingSpec". I've read other reviews that suggest the original KingSpec SSD had a plastic case with unthreaded holes; It has a metal body with threaded holes. On the other hand, it fits perfectly with the HD Caddy for my old Compaq Presario R3000 laptop. On the other hand, once screwed to the case, the SSD was oriented too far forward to properly fit in the laptop. However, I can't be sure if this is a fault of the SSD or the laptop as Compaq/HP quality control was pretty poor when this laptop was made. Laptop HD resonator with tape and foam and it works great (this laptop is used as a desktop so the case doesn't have to be perfect). In the last week I've formatted the SSD, booted an OS onto it, booted from it and loaded enough data to fill it to about 20% and no problems so far. I'll try to update this review after using the SSD for a while.
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