One bug I want to raise is the following using IE:

After selecting my hotel and rate, I am on the final confirmation page. In the beginning there is a choice of logging in as a Hyatt GP member. Doing so results in landing on the account overview with no way back to the confirmation page. One has to start all over again to finish the reservation.

Logging in on the top right corner however results in staying on the confirmation page and I can type in my credit card details and I am done.

The other workaround is logging in before starting the reservation process.

Would be good to fix that as this might cause a lot of GP members a lot of inconvenience when booking online.