It's my go-to part for this purpose also (and I don't believe I've encountered any clones so far, knock on wood). Another part I've used in a high-volume application is the Holtek HT42B534 which is great because it's CDC class and hence doesn't need a driver for Win/Mac/Linux. It's EOL sadly. There's HT42B564 which is a HID-class replacement. The other alternative is using a cheap micro with USB interface.