The eighth volume of "Ben 10 Alien Force" is pretty much the same as all the other DVDs starring the Omnitrix-wielding Ben, the magically-powered Gwen, and the now-mutated Kevin in 6 episodes on this DVD.
In one of the episodes, Ben actually helps Vilgax (no, seriously !) defend his planet against an army of Ghostfreaks. (Remember Ghostfreak ?) And of course, "Alien Force" DVD would not be complete without an Alien Database that gives you specs on the certain alien heroes and villains as seen in the series.
If you like Ben and the way he transform into cool creatures like Swampfire, Humongousaur, and others, then I'm sure you'll get this, plus keeping an eye out for more new episodes of "Ben 10 Ultimate Alien" on TV and even online with missions involving Ben in Cartoon Network's FusionFall game. Also, look for the ninth and final volume coming to DVD soon !