They are uncut, and have both the original Japanese music and Toonami music as choices for the dub. Unfortunately, the video has been cropped to widescreen with missing information on the top and the bottom, and excessive DNR has been applied resulting in a loss of detail.
Honestly, it's hard for me to go back to Dragon Ball Z after watching Kai. The fights are much better paced without the filler padding them up. The best part is the sets for Kai are uncropped 4

. Plus, Frieza doesn't sound like a chainsmoking grandma anymore. Gohan and Bulma take some getting used to, though.