I've used both of those brands regularly as well. I like Dainichi pellets.

I was excited to see the H2O flake foods since I love their frozen, but I was disappointed with it. The nuritional analysis is what convinced me to try it, even though I already have an arsenal of dried foods. When I opened the containers, the flake was very small and crumbly. Flake doesn't usually get like that until you're at the bottom of the jar. I use it in an automatic feeder, so it clumps from the humidity and clogs the feeder. :(

Chris, was you're flake crumbly right from the start?