The extras included on the release are relatively minimal. The blu-ray comes with a DVD copy (it is a single, two-sided, disc) and a digital copy which, sadly, is Ultraviolet and not iTunes compatible. There are also a series of short comedic bits with Tom Lennon riffing on the movie or the production, some of them work well but others are less amusing. The only true behind the scenes piece is a discussion of the claymation sequence in the film and accompanying storyboards. It doesn't really go deep enough into the process, but it is nominally interesting. There are also a few deleted scenes included.
Of course, if you're truly the imagined target audience for a Harold & Kumar feature, you probably aren't going to care about the lack of special features – all that will matter is that the jokes land and make you laugh. It is another good outing for Cho, Penn, and company, and hopefully there are many more adventures to come.