When using iOS with the built in screen reader VoiceOver:
http://apple.com/accessibility
(settings, general, accessibility, voiceover)
Controls or buttons such as "reservations" are spoken only as "button" "button." It appears they lack the iOS programming equivalent (not sure what its called in IOS) of an HTML alt-tag.

Apple has a development guide on how to ensure iOS applications are accessible at:
http://bit.ly/ia11ydev

Also agree that functionality should take priority over pictures of a kid with his dad, or whatever the graphic is.

I'd like to see a web check in process where you can get your room# via the app. And mid to long term, I'd like to use the phone, or some type of permanent card, as a room key. I've noticed certain Hyatt's, like Crystal City, now use a proximity card type key and I'm not sure if this is a technology upgrade that would facilitate a sort of permanent key?

I would also like to pick the Diamond amenity (able to review the properties choices) from the app.

Also agree there should be good intigration with your current stay with both current and future functionality and capabilities.

Glad Hyatt has an app now, I'll likely mostly use it to more quickly check to see if stays post, and possibly to make last minute reservations. Would also see most using it to check to see if I have been pre-blocked with an upgrade or to a regency club floor. Will also use it for web checkout, I do like the email/mobile web checkout feature.