Actually when you really think about it, it's a pretty freakin inventive way to solve a big problem. Fortunately/unfortunately a change in power/leadership in the Soviet Union at the time killed the project.
Instead of flying in tons of transports, which would most likely have been shot down, or sending in a fleet of slow moving ships to assault ground defenses you take care of both at the same time. You move in a bunch of large ground effect transports that fly below the radar, hop over bridges, carry the troops and the cruise missiles all in one go. Maybe not cost effective as it was never used, and has no other real practical use, but still pretty smart.