This product is really excellent. I have an HP 476 MFP in my school office and use it to print school-wide materials and certificates and report cards. I bought it in late May and have been able to print hundreds of certificates and over 800 transcripts in duplicate alongside my general printing needs. The most amazing thing is that I have just placed a 2nd black since the school reopened. This saved me so much money! I usually had to change the toner twice to print the same thing. I've just ordered my second set but haven't opened it yet because my first purchase still prints well.