Marcie - the Hyatt in Montreal isn't that good - most of my friends really much prefer the W there.

John - Getting the Hyatt credit card will get you 2 free nights in a regular room & Platinum status if you didn't have any status with Hyatt previously. If you were already Platinum with Hyatt (which many people are since early in 2010 they were running a promotion for "instant" Platinum status), you get 2 free nights in a regular room + 2 suite upgrade electronic certificates (can only be used on revenue stays). If you were Diamond (top published tier with Hyatt), you get 2 free nights in a suite. Hyatt treats their Diamonds very well (I've been a Hyatt Diamond for 7-8 years).

Which Hyatt are you booked into in NYC? The Grand Hyatt is perfectly servicable but is a huge convention oriented hotel - many of the "regular" rooms are small and dark - the property is slated for a major renovation so we'll see what its like when they are done. The new Andaz 5th Avenue a few blocks away is a much better choice for Midtown. If you don't mind the Downtown/Wall Street location, the Andaz Wall Street gets pretty good reviews (I haven't been there personally though).