Decent and worth the 25 minutes overall if you liked the anime.
There is very little perverted content here compared to what might have been expected, just Illya in a few sexy poses wearing a certain outfit. Other than that, the rest is comedy based and quite decent. Involved are 2 actual games that are spoofed with a funny twist, some teasing from Ruby towards Illya, and a few other bits covering the other characters. Decently funny and a reasonable complimentary addition to the anime itself.