I bought these cartridges for a Lexmark Pro 901 Pinnacle and sadly they don't work as the printer thinks they are empty.
I hadn't needed to replace them until this week after buying them some time ago as they looked to be good value.
Sadly, the printer doesn't recognise that they are full (except one yellow one that is actually almost empty!) I have tried them all and none worked apart from the yellow.
They don't click into place in the same way that real Lexmark cartridges do and are quite loose. I guess the bad quality contributes to this poor fit and is maybe why the rpinter thinks they are empty, even though they have plenty of ink - there's so it even leaks out of the sponge at the bottom.
Avoid these and look for some that actually work.