Brahms. Bass Clarinet. How hard can it be?

Most of the standard classical clarinet repertoire is meant to be performed on the Bb clarinet (and sometimes the A clarinet). But what happens when you perform it on that most wonderful of clarinets – the bass – instead? Does it work, and are there different considerations in how you play it technically?

I had a stab at the Brahms Eb Sonata 1st movement – with mixed results!