My Take
I do enjoy the website. The only set up is creating accounts. Otherwise they work at their own pace.
How I Use It
I use this in centers, whole group, fast finishers. Kids love this! They like to battle each other and play friend from other schools. I also use this as a my computer center when doing math centers. My whole class will play on our mobile lab and love to play against one another. My fast finishers can go back to my stationary computers and play.