MassSave, Great Appliance Exchange, Cash For Clunkers or whatever the name, has been huge in other states. For example, Rhode Island ran out of money within a couple of hours.
There are a couple of considerations for Mass residents. First, there will be shortages, because we are last to promote. Secondly, not all the products qualify. In fact most do not.
Let me break it down by category.
Dont bother (either doesn't qualify or has no availability):
Almost anything front loading qualifies
Bosch (they have limited supply, if any)
Refrigerators are the weakest category. Frigidaire has not shipped their tier 3 qualifying refrigeration. Bosch has zip. Most of the premium products do not qualify....
Everything else with some minor exceptions
So good luck...do some basic research and you should be able to buy very well (at least until the money runs out)