I have a dd with ADHD and dyscalcula (and we've done vision therapy, OT, etc).
I did not choose Singapore because she needs a very repetitive program. CLE has been a good fit (but I supplement). She really needed the daily drill to cement her facts.
We toyed with MUS. I had her watch the introductory DVD about place value and it confused the heck out of her. She is very literal so the whole houses and neighbors thing (i forget now) threw her for a loop.
I really, really wanted Singapore to work. I've had her take the placement test twice and almost bought it. Then I borrowed a book from a friend and in one sitting I knew it wasn't what she needed.
The reason I like CLE and, as much as it pains me (because I hated teaching it in the classroom), Saxon, for kids like this is that they can learn something and do it in the moment, but that doesn't mean they've solidified any skill. The pencil to paper process is sooooooo much harder for them than it is for other kids. They need the repetition so that the processes become solidified.
I still supplement a lot so that she is exposed to the concepts from lots of different angles. But the core of her math is CLE because, well, it works. 3 years of school with Math Their Way (which I loved) and Real Math and this child still couldn't tell me 2+3. One year with CLE and she knew all her add and sub facts.
I hope that helps somewhat.