This robot is the perfect introduction for young minds into the world of robotics and programming.
It's a solid, durable machine which it would need to be in the classroom and the starter programs you can get simply by printing the free "mat" on an A4 piece of paper are a great way to get kids instantly engaged.
The programming interface is also incredibly simple yet powerful enough to string together quite complex tasks. Again, the software is free and can be worked with either online or by downloading an installer.
There are some minor issues with it in that Edison's sensors can be a little unreliable in certain conditions, for example the sound ("clap") sensor doesn't always recognise two distinct sounds and the proximity sensor can be a bit of a struggle to program correctly.
If you're printing the free mat out, try to avoid shiny surfaces such as glossy paper or laser printer ink. This can confuse Edison's IR sensor underneath and in sunny or bright conditions it may not recognise boundaries correctly.
Overall, in terms of affordability and features, this is quite easily one of the best products I've seen for educational use.