Bismarck enjoys them, but as a dissenting voice I'll add a couple big complaints I have.
You don't do anything but navigate a few lead ships. It still tends to keep you busy since you issue a rudder turn & set the speed on the lead ship of each line and have to cycle between the groups. But it's all about jockeying the helm to keep a decent position. Everything else is run by the AI and feedback is very sparse, even.
While it has a campaign, it's just a series of point-buy battles with carryover, in open seas, and you only have about 5-6 ship classes to choose from.
I felt like they could've really had an interesting system if they would've taken the first turn-based game they released, set during the american civil war, and expanded upon that system with more detail (and lower the turn scale regarding time as that was the big complaint about it). Instead the devs changed the game into a real-time game where you set steering orders and watch the very slow action being carried out by the AI.
It's unique in that it covers late 19th century naval warfare. But be warned that the gameplay, notably in the real-time versions, can be very slow and uninvolving.
