Hyatt is having their monthly 48 hour sale where you can save up to 20% off of best available rates (BAR). Sometimes you can save quite a bit of money and sometimes you cannot. You can access the Hyatt’s web page for this promotion here.
These rates are valid at select US, Canada, and Caribbean hotels for stays between January 30 and April 30, 2013. The promotional dates for individual properties may vary. You need to book this offer by 11:59PM CDT on January 16, 2013.
I would only book this rate if it is significantly cheaper than refundable rates as plans often change. This sale is a monthly one from Hyatt and these “sale” rates are often not that great. Have a look at your upcoming Hyatt reservations to see if there are opportunities to save.
Hyatt doesn’t seem to have a list of participating properties available, as they have sometimes in the past. You need to check city by city and have the C48JAN on the promotional code field when executing the search.