I know talking about chains in this thread are looked down upon, but I actually tried one yesterday, not expecting much. The portions on a single are skimpy but if you double up on the meat, it comes in at about $13 for a 6 inch sandwich and the meat equivalent of a 1 lb lobster. I have to say it was quite good with actual chunks and claw meat of lobster, not just eviscerated bits. Certainly better than the lobster rolls, the McDonalds in Boston served up when I was living there.
All I needed was bit a lettuce, salt/pepper and a bit of extra mayo.