My Take
I like this app. I know that for my class the vocab deck takes time to make, but the SD card option makes the work a one-time deal. Any app that helps build background knowledge is a great tool.
How I Use It
I use the L to J vocabulary system in my English class. We have 100 words for the semester. I supply a list of good apps for students to use to study the words with. Flashcards Maker Pro is the one most of my Android owners end up using. They like the text-to-speech and timer options. Many times the students will use the app to study other subject's vocabulary. The students also like the ability to share a deck with their SD cards.