I know it's an old post, but I hope this will be of help to someone!!
I have worn CRT lenses for nearly 10 years, and I can tell you the following:
Pros:
-freedom from contacts/glasses during the day! Soooo nice!!
-Although at first having to put them in at night was such a nuisance, now it is like brushing my teeth.
-RGPs last such a long time (no need to replace them every year)
Cons:
-the fitting does take a while to get right
-price of fitting
-increased sensitivity: After a while, I started realizing that my eyes were more sensitive to strong substances (e.g., onions). They also feel very dry whenever I DON'T sleep with the lenses in (if I forget).
-unlike some people, I do have to sleep with them every night, or my visions not very good (even if I nap during the day, my vision clarity decreases.
-if ANYTHING gets in your eye as you're inserting the lenses, you will feel a lot of pain and have to take them out immediately. That's probably a given, but just so you know!
history:
started off 2005 at -1.75, no astigmatism.
I was re-checked while abroad in 2012 (couldn't find a orthokeratology dr.) after not wearing them for 2 weeks, assessed to be at -3.00 with some astigmatism (can't remember, 1.5 maybe?).
Control: I have an identical twin, whose eyesight was .25 diopter better than mine before I started with Ortho-K, and now she's at -2.75 with minor astigmatism.
Hope this helps!