[Sailor Steve]

Direct answer to your original question:

SH3 is released. It sucks. Many bugs. Four patches later it's pretty darned good. Four years and many many many mods later it's one of the best sims ever.

SH4 is released. It sucks. Many bugs. Five patches later it's pretty darned good. Better basic game than SH3, many earlier complaints answered. Better graphics. Better crew management. Better campaign. Two years and many mods later it's on its way to being the best sim ever.

Until SH5.

Yes, you should get it. You won't look back.