For $10, would be on the short list of the best computer gaming investments I would make...
It's a great game, especially considering its age. SH4 has an active group of players adding and editing mods for an active community...
IMO a no brainer for anyone interested in WWII submarine warfare.
For the stock v1.5 game the "bugs" seem to be more an incompatibility with the users' PCs... I have been playing off and on for five or six years without a single issue that would move me to pull the plug on it...