I like that it allows me to use my own images, as well as stock photos from various sources - no need to pay extra when using other people's work! It is easy enough to figure out how things are organized in terms of file types/sizes etc., so there isn't much room left over once you've got your first couple dozen or hundred pictures uploaded (or even after adding more).
The customer service has been great throughout this process; they were very helpful with helping us understand which features we needed vs what was just "nice-to have" functionality.