This one is a bit religious. I'll draw the analog to how you drive. If you're the "cannot own a car without a clutch" type you're not going to get on well with an eCCR. I don't even like being a passenger in a taxi with an automatic transmission; I dive a mCCR. Wife is a serious photog and wants hands free, she's diving hCCR.
Personal experience is that it was hard to learn CCR diving. I had thousands of dives on open circuit. My wife had far fewer dives (only several hundred to OC tech) and didn't understand my struggle at all. Based on that, I suspect the earlier you transition the less you'll have to un-learn (but there's a balance because I firmly believe that you should be qualified to 100m on open circuit before pursuing CCR as you'll need to have those skills dialed in, in a very absolute way).
No, but I have learned to really appreciate freediving since I left open circuit diving. I've either got no gear or all the gear these days.
How much do you dive? 4-6 hours/week is a good week of diving, less is very rare, 10+ hours/week is quite a good week. I believe that CCR is about muscle memory and addressing the issues that come up through simple probability. Both frequency AND recency are important. If you dive a lot, I think CCR gives you a whole sh!tload of options you wouldn't otherwise have. If you don't dive a lot, the complexity of the procedures will probably make you more likely to hurt yourself.
---------- Post added July 31st, 2014 at 05:30 AM ----------
Yes. You're ignorant.
---------- Post added July 31st, 2014 at 05:32 AM ----------
I guess your understanding of fixed PPO2 and how it impacts decompression is also incomplete?