[Plugin: Meta Box] Simple checkbox

Looks like a nice plugin, but I can’t seem to make a simple checkbox work. Shows up nicely in the edit screen, but can’t do anything with it for the frontend. Please could someone help?

My query looks like this:

WP_Query( array(
'post_type' => 'any',
'meta_key' => 'cycle_slide',
'meta_value' => 1
)
);

I’m guessing the meta_value is either 0 or 1 for a checkbox?

http://wordpress.org/extend/plugins/meta-box/