* I like the footprints in the logo a lot - it makes me realize quickly that this is an app for exploring nearby. The logo could be easier to read. White line on red outline is pretty hard on the iPad.
* The "Click here for travel dates" is too faded to read easily.
* When I type "San Francisco", the AJAX loader takes quite a while. This may just be server load - consider pre-sending some results for popular cities, or the most likely cities, or ideally do a geolocate on my IP.
* I like the page slide effect a lot.
* I don't understand some of the images, like the mardi gras mask on the "Contact" page, or the gray drops on the "Work with us" page. On all these pages, consider moving the logo from upper right to upper left where it's more typical thus easier to find.
* The explore page UX/UI is gorgeous. Very well done. The pics though seem to be quite vague, especially of the bars and restaurants many of which look like blurry snapshots of unknown backgrounds. See San Francisco "Baretta" or "Clift House" for examples.
Great site overall - will definitely use it.