I picked it up briefly to familiarity. You can learn to read it very quickly ("read" here meaning you no longer need to refer to the key so you can increase your reading speed just by reading more). If you're going to learn it consider learning dotsies v3[0] instead. All vowels plus y, and only the vowels, touch both edges which fixes the main issue, that you can't tell abcde apart.

0: https://news.ycombinator.com/item?id=3602163 the bottom link is v3.

I just now spent about an hour reading the homepage's article that incrementally introduces dotsies characters. It went surprisingly smoothly and effortlessly, though my reading speed was fairly slow compared to normal.

I'd say it's a fun exercise for anyone at all interested.

I could read it at first glance, I didn’t need any training. Maybe it’s different between individuals