Has anyone used multi-select lists?

I have been successful in adding attributes to our work items that use multi-select lists in the editor presentations. It seems as those the support the multi-select lists ends at this point.

If I try to include the attributes I added in a query I see values that look like "Cards.literal.l1" which is not value selected by the user. Can you display multi-select attributes in a meaningful fashion?

If I try to define a query that tries to query based on the attribute, you are forced to use a full text search (using the GUI query creator). I am still trying to figure out how to do this. So far it appears you need to search for the "Cards.literal.l1" string and I find the results are incorrect.

Am I missing something or are multi-select attributes totally useless?

Thanks