I also saw this on the DVD double in which it is paired with Clara Bow's "The Plastic Age". That is the one I mainly wanted to see, as I only recently became aware of the incredible talents of Bow in "It" and "Wings". But "The Show Off" was the better of the two, solely for the talent and charisma of Louise Brooks in a supporting role.
I thought of Bix Biederbeck, popular at the same time, the Jazz age of the '20s, in watching Louise in this rather trifling comedy. Bix played in some competent bands, but when he began playing his solo, it had the glitter of a diamond that still has the power to excite to this day and elevated the material to greatness. And Louise Brooks, playing the good and sensible girl next door, has that same brilliant quality in every gesture and expression, however subtle. She would of course go on to star in some much heavier films as a vamp or a "fallen woman" and is considered one of the great silent stars because of those roles, but her early performance here is just a joy to behold.
BTW, Clara Bow is also wonderful in "The Plastic Age". It's a shame that more of her films aren't available for viewing, she was a great actress and a groundbreaking star.