Digital BW, The Print

Is there anyone out there with significant experience with the PiezoTone inks 
and who also has tried printing B/W output from the Epson 2200 who can 
critically compare these two.  There are conflicting reports:  some are ready to 
pack up Piezography, while others are saying the 2200 still can't compete for 
B/W output (e.g. continued problems with color casts and metamerism).  I am 
especially interested in anyone who has custom printer profiles for their 2200 
or who has access to the Gray Balancer software.