Maybe I'm just tired, but both of these were near-uninteligable to me even at the beginning. It could also be simply that I'm a bit compulsive about reading -- I find it impossible to gloss over even a single word that I can't puzzle out, so even the first lines stop me in my tracks even though I can read all the words but one or two.
In any case, if you have the inclination, a version that started even more gently might work better for me.
I spent quite a bit of time on the first link, but I also quite like this one. I think to me a lot of the value is just gradually introducing a few characters at a time - not really sure about how much my brain is picking up the shapes of the letters subconsciously. Would be interesting to do an experiment.
I would actually prefer that the hints stayed for all the letters, even without a grey line or whatever. I used it very rarely (and have enough self-discipline not to overuse it) but once in a while when I've forgotten a letter, or are not sure, it's a pain to look it up because the hint has disappeared.
It would be fun to experiment with putting this font on my Kindle btw.
I wonder if it would be interesting to have a hybrid. Like maybe the letters could start out as Roman, then change (one at a time) into the letter-shaped dots, then change (one at a time) into just dots.
I think that I mostly had a problem just understanding the letters of the original font. It's probably harder for me to convert using a normal font, but at least I can read it in general.
In any case, if you have the inclination, a version that started even more gently might work better for me.