This is a great app! I installed it a couple weeks back, but never set it up until today because I'm lazy like that!
I added a general folder with all my "portfolio" photo's in it, then created 3 separate ones for People, Landscapes and Architecture. Have yet to run into any problems with the slideshow, orientation, or anything. Seems rock solid and the amount of features I think is just about right.
Perhaps it's my installation, or the tablet itself, but the only minor thing I noticed is when using the full screen view and swiping from picture to picture, there's about a 2 second delay before it slides to the previous or next photo. When I initially saw that, I thought it was unresponsive or just not something I could do and it would work as a slideshow, but then it moved along. Is this the intended behavior?
I plan to use this app to show clients and just to show off my work in general whenever the opportunity arrises. It's a very slick and clean looking app, with minimalist style, which I personally think is crucial to a portfolio layout. Keep up the awesome work on this!!