As far Sanshou goes, 38-year old actor/part-time fighter Cung Le has been washed-up for years and has never been orthodox either due to his training or the rules he competed in. To make an asessment of the style based solely on him, jesus...
It's not just about crazy and much varied kicks or interesting footwork. You are going to "box" from crazy angles (which should be supplemented, as all striking arts, with actual boxing) and catch kicks in insane ways. You will learn a shitload of trips and takedowns that are meant to blend directly with your (and, more specifically, your opponent's) striking; not in a segmented way. If you have any doubts about the reality of that, just watch some videos. It's actually the one thing where the bad fighters usualy excell at. The wrestling arts of China, Shuaijiao, are not only as effective as any, but ridiculously varied. It's like mixing freestyle with judo -- the projective techniques in Okinawa come directly from there.
All in all, Sanshou has a lot to do with some forms of karate, and for good historical reasons - the arts of Te that went to Okinawa were strictly chinese, the Bubishi is a translation from the chinese etc. Of course Mao strictly forbade them and killed several martial arts, leaving the world with the state-sponsored ''wonders" of wushu and other absurds, but these full-contact styles were the resource at hand for the creation of the officialized mixed style of Sanshou/Sanda. If you have a background in some form of karate or another, it might help assess it. Look how Cung Le Machida'd in his last fight.
Btw, you will hear from some Chinese that it's a sport/ruleset and not a style per se, but I disagree. There's room for small variation in backgrounds, but it's very much linear.
That being said, I'm in China and I don't practice it. But I hold nothing against it whatsoever and it seems like a opportunity not to be missed.