I have kids in K and 1 in a Miami-Dade public school. Granted, they're learning K and 1 stuff, but they've both complained about the slow pace and general easiness of the math. There's been a lot of counting to five, and 0+0 type math. Nobody in my family is a fan of Go Math.

On the bright side, the online version of Go Math has links to related lessons on Destination Math (also available on Riverdeep). Both my kids love Destination Math, and they learn the concepts readily in that format.