Are you using it? How about the RSS reader?
Just curious how many users of Opera also use it as an email client. I'm currently using Eudora, but am looking for a reason to switch to Opera, which is my main browser.
Also, has any one tried the new RSS reader in the 7.5 beta?
I'm trying M2 now. It took me 3 days to learn how to use it though! It is completely different from other mail clients. Instead of folders, there is just one big pool of messages. To sort them, you must filter the view. You then get what look like folders, but are just filtered views. (Confused? I don't blame you.) Apparently this makes it much faster and flexible.
It has a good anti-spam filter which learns over time.
The only drawback is that you cannot create HTML emails yet. (Though you can view them.)
There's much for me to learn still, but once you get into the hang of it, it works like other mail clients.
As for the RSS feed reader, it's OK. A bit buggy but they'll definitely be improving it I imagine. It works by sending new posts as if they were emails. This works quite well in practice.
I've been using M2 for at least 6 months, and I really like it. I can't say much about the spam filter, as I've carefully protected all of my addresses. I will say that it's system of views and filters works really well.
I tried the RSS reader briefly, but I'm not sure if I like the way it works. I'd like to see it moved into it's own panel, but that's just me. Definatly something I plan to give another try.
I'll add to the list. Been using Opera mail for a couple years and M2 for the last 6 months. Very nice!
I've said it before; I'll say it again:
M2 changes the way you use email - you'll never go back. The view thing is incredible - basically, your mail is stored in a big database, and you create views by querying the database. Your views are stateful, you only have to create them once. If you delete a view, the messages don't go away. And, with views, your messages can exist in multiple views! Very helpful for making views for people, companies, and particular jobs.
It's the same concept as the BeOS filesystem (if you're familiar with that). A huge advantage is that searching is extremely fast - takes less than a second to search the 30,000 messages in my box.
The spam filter is pretty good, but took about a month to learn and still misses on occasions. The biggest shortcoming for me is the lack of spell check support on FreeBSD. It works on most platforms, just not mine.
I'll echo everyone else: RSS reader is kinda weird. I played with it, but really don't read RSS enough to have an opinion. I'm sure it will only get better.