The walking tour is accurate has has all of the "typical" tourist spots. I LOVE the bathroom location feature as it's often hard to find one in OSJ!
Ports of Call now lets you create your own photo and audio albums at each location (up to 100 pictures and audio clips per location).
You can also choose to replace the default pictures with one of your own photos. And any locations that do not currently have photos (restaurants, stores, streets) you can update with your own pictures as you visit those spots.
With this added capability you can enrich your visit with all your own photos logically organized by location.
The only branded upscale hotel, located in the heart of Historic Old San Juan