Overall, I think I like it. But a couple things bug me. Maybe they're just early bugs that will work out. One thing that is definitely different, that I do not like is the fact that if you are writing a reply, and go back to check an earlier post in the thread, you lose what you've written when you go back using the forward arrow. For someone with as poor a memory as I, and not wanting to use quotes, that is an aggravating loss. I have to save everything before I can back out.
I'm having a hell of a time with the icons that tell whether I've viewed a post or not. In one forum that I'd not visited in at least 2 weeks, every message showed as old. In other forums, threads I have read are showing as new. Particularly for when someone has been away from a particular forum for awhile, this is quite aggravating. Again, my poor memory only makes it worse.
One thing I am not understanding at all is the threads with the downpointing arrrow. Am not sure if it is a message icon not listed, or something different. Know for sure I don't know what it means, and don't know where to look to learn.
One feature that I really like, if it works -- haven't checked yet -- is where one can have replies to your replies answered. For those occasions where one asks questions without beginning a new thread, it could be great!