Very interesting set of rules. Simple, adequate operational coverage of WW2 naval warfare. Definitely download the free campaign pack. Similar to Avalanche Press's Second World War at Sea series of boardgames in scope and complexity - sans little hex map for tactical battles. Will play more like the Avalon Hill classic Jutland with each player having a hex map for hidden movement and battles being resolved on a table with miniatures or counters. I hope new campaign packs are forth coming.
I own multiple rulesets from Long Face and have never been disappointed. The rulesets are always loaded with innovation and information.