i've had a handful of orders through LA/DD so far, and i've been very happy with the fish i've gotten from them. excellent condition, eating well, etc... i had a clam i ordered from them die, but they reimbursed me minus shipping costs.
i do really like to see the fish, especially see them eating, before i buy them. i usually only use LA/DD for things i absolutely can't get local. my experience with LFS has been similar. in most cases the fish are great, in some cases they are not, but since i can observe them up front i am usually well aware of what i'm getting myself in to. most of my fish have come from an LFS.