I have been using Newsfire since February of last year. It was the first RSS reader that I've ever paid money for. Newsfire had a good deal of issues that I didn't like. I emailed the Newsfire developer and asked if a bug could be fixed, but he replied that NewsFire wasn't in a development cycle. He wasn't very nice about it either. Anyhow, I had been tempted to go back to NetNewsWire for some time now, but never did because I didn't want to pay for a second RSS reader. Luckily for me NewsGator is now giving away NetNewsWire for free! I have switched back and I am extremely happy so far.