Digital BW, The Print

I've been using the original piezo ink with the piezo driver for over
a year now. My ink is about out and before I commit to new ink and
plunk dowm some more hard earned 
geenbacks, I wanted to get some group feedback. Based on the comments
I've seen here, I am not confident in the Cone marketed inks (sundance or
piezotones) anymore. MIS make an 
equivalent quadtone ink set that they say will work with the piezo
driver as a replacement for the Cone(Sundance) ink. Has anybody tried
this? I'm at a critical point here and 
am about to abandon the whole process because of all the
frustrations. 

John Luke