Lobster or any other base, used on it's own and in place of a natural stock, can be pretty vile. It is best used as an enhancement to bones, shells, what have you. Many years ago, in the kitchen of Hotel Adolphus in Dallas, I was privileged to work briefly alongside our consulting Chef, Jean Banchet, who used Minor's lobster base along with tons of lobster shells (and not as a replacement for) for our lobster bisque. Years later, at The Mansion on Turtle Creek, where bases weren't allowed in the kitchen, there were many instances where a soup or sauce made with natural, but weak homemade stock, could have been improved on with some commercial base, used intelligently.
Most bases require refrigeration, so I'd be careful using that stuff.
"Bass Trombone is the Lead Trumpet of the Deep."
Rick Hammett