And a lot of people's biggest complaint is that HN does not notify you of replies to your comments. I use HNNotify to inform me of replies but it is not perfect

And a lot of people's biggest complaint is that HN does not notify you of replies to your comments. I use HNNotify to inform me of replies but it is not perfect. The big problem with HNNotify is that it also emails you top level comments for every story you submit. A less frequent complaint is that you can not collapse threads. Neither are an issue with mailing lists.