Except that the old iSpot forums comment, replies and the way that it connected the threads is far superior to this.
This is a linear system and it sucks! Following threads is impossible. At best you can see who you replied to by clicking on the top and who replied at the bottom.
But it is far superior to the current comments on observations which hides after 10 comments, and if you reply to a comment after the 10th, then the first page loads and your reply vanishes onto page two and yuo have to start again, trying to find out where the reply is.. REALLY SUCKS.