Problem with the user groups is that you cannot submit pictures directly to a thread about a particular topic.
Following a topic is a pain in the ass because it can end up on several pages.
So, I like the forum design better, much easier to interface.
I am a user on the KX3 Yahoo group, I have to admit it is MUCH easier to follow than their reflector, but this forum is MUCH easier to follow a particular post by simply subscribing to the one that interests you