I have used this site to provide MIDI examples for my students during technology demonstrations. My students have used this site to help them complete some of the course assignments. The organization and ease of access to the files is very good. The students like being able to have choices within each of the periods. I like seeing them motivated. There is a place where you can submit your own MIDI files for inclusion at the site.
To listen to the Classicla MIDI sequences, you must have a MIDI player associated with the .mid extension in your web browser. There are many MIDI players available such as Media Player and Crescendo.