It replaces most of my Reddit time. I still find myself going to some subreddits that have activities wince several here that are more niche have zero activity.
The UI is nice, although seeing duplicate posts can be annoying. Pagination could use some improvement. When browsing by new, new items posted seem to push the list so you could see the same items over and over it enough new items are posted. Adding some kind of timestamp and better list filtering could improve the experience.
The people here tend to be nice. Conversations have been mostly pleasant.