I bought both
Hip Hop Abs and
Rockin' Body recently (despite being dance-challenged).
I did a couple of the
HHA ones and didn't enjoy them. Shaun's cueing left a lot to be desired. I didn't find them fun.
I do like
Rockin' Body, although it has a huge cheese factor. Shaun cues better in this. He is, um, rather flamboyant in both of these sets (not the reserved and professional Shaun from Insanity/Asylum). IMHO,
RB is more fun, if you like things a bit over-the-top.
Both sets have a modifier named Tanya who does a really good job of showing alternative and lower-impact moves. I'm not sure whether they are suitable for a beginner or not.
Hopefully, someone else will chime in with more info.