Digital BW, The Print

Hi All

A friend asked me why we don't see more written about the HP printers, their photo grey 
inks, and the quality of black and white prints they make. To be honest - I don't know the 
answer, so I thought I'd ask the group. What is it about these HP printers that makes them 
"popular" here and elsewhere on the web? It seems its hard to find any group discussions 
about them from a google search.

Thanks in advance

Phil C.