There's an inexhaustible hunger for "basic training" movies, so it's surprising that this one got so little notice when first released. Looks likely to have a well-deserved second life on DVD/VHS.
Tigerland isn't uniformly great by any means, there are some terribly cliched characters (especially the portrayal of the NCO's, makes you long for the return of Lee 'Full Metal Jacket' Ermey) but the lead performance of Colin Farrell is the stuff of instant stardom. Charisma to burn and a role any actor would kill to get.