I just received these. I've paid 12 € for them (had to wait a little while, but got 20% of and a nice price with the dollar / euro...) just to be the backup for my CX300 II. The accessories are amazing! Really, for just that 12 euro... How is it possible?!
I will review them when I receive my Beta Brainwavz too, but the first time I've plugged em in with the foam tips, I was like... Wow, that's some great sound quality! I've only been using them for 2 hours now, but they do sound good. They might be better then my CX's but I don't know yet. Maybe they'll be my main iem's now

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Like david432111, I'm also checking the PL20 and PL21, since the reviews here tell they might be better. Well I'll just try the PL30 first for like 100 Hours, I'll check the other ones later. Right now, I'm very happy with the PL30.