With how my sites are setup, I've experience some issues with Shareholic showing up on custom post types in wrong spots, but I was able to disable then and call to them via a PHP do_shortcode() call, which made my day!
I really love the looks and different options of the sharing buttons. This allows me to use Shareholic on many different sites because there's always a button style that works with the site I need it for! Awesome.
Also, I've used their WP support forum before, and they were surprisingly quick to reply! That's always a HUGE plus in my book. :)