I bought an aneros four days ago. Until now I was never interested in anal play, but I've seen some videos of men using it and it looked fun (and a little bit scary, with all the twitching and stuff). I also bought a simple prostate massager, because I was in an adventurous mood that day. I read a lot about having to wait a long time to "cross over" and reach an anal orgasm (or Super-O), that's why I was pleasantly surprised when today, after four days and four sessions only, I had an experience that can only be described as "prostate ecstasy". Calling it "orgasm" is not really correct, because an orgasm ends, but what I experienced was continuous. Wave after wave of pleasure. Even at "low tide" the sensation was strong enough to lose almost all control over my body. I was shivering, gasping and laughing all at the same time. And even now, after more than 4 hours the beautiful feeling echoes.
What I felt today was more intense than any orgasm I ever had and that's why I decided to post my way of achieving it, hoping it might help someone else.