I had two DGB900's over the last 6 to 8 years.  That's the one with the built in bean storage on top and the bur grinder.  I loved everything about those machines, except that eventually they both started to leak water during brewing, getting the counter all wet.  I knew some other people who had this same machine and everyone of them had the same leaking problem happen.  This DGB400 is a warranty replacement for the 900.  They were very good at honoring their warranty after I totally disabled the 900 by cutting the cord.  I received the replacement within about 10 days. The DGB400 does not have a bean storage area and uses a blade grinder.  The Conair/Cuisnart company tells me that they no longer make the 900 (probably couldn't stop the leaking problem).  Anyway, so far the 400 is working very well!