I've done some training in it on a basic level. I liked what I saw, though you will most likely hear some controversy on the weapon disarms. As far as that goes, I suggest keeping an open mind. Of course, depending on who you talk to, you will hear that they are not as good as (insert style here)!!! IMO, you're the one training in it, so you will have to decide for yourself.
One thing that I liked about it was the simplicity of the techs. For example, you'll find that for a 2 hand choke, either from the front, side or rear, that the defenses all start the same, with what they refer to as a 'plucking' motion. I find that this is helpful because in a stressfull situation, you won't have to think, "Ok, I'm being choked this way, so I have to do this defense." As I said, the initial move is the same regardless of the side its applied on.
IMO, its an effective system. The material is simple to do, easy to remember, and to the point!!!!
Check out the school. Make sure that you ask questions, and if they offer it, which most schools do, take a trial lesson.
Good luck and let us know how you make out!!! :ultracool
Mike