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. :)
I'm slowly growing despondent with this plugin... every time I turn around after an update, there's a new feature meant to gain them money by throwing ads on my websites. So, that means I have to go back into all of my clients' sites and turn OFF this features because they automatically turn on after updating to new versions. This goes hugely against my open source moral code. The untrustworthiness of this plugin now is extremely frustrating.