I haven't tried Cricket Crack, but I can vouch for Bug Buffet.
The feeders go absolutely crazy for it and it's made with some really great ingredients. Bug Buffet definitely has my recommendation.
You can order some by sending SMCNARY a PM here on the forums.
I never used crack before but all my feeders love bug buffet. Steve does a lot for this community and I can't think of a better person to buy gut load from.
I've used both and rotate around with different dry gut loads. I've read that continues use of the same gut load year after year could cause gout so I find it best for my animals to rotate several good dry gut loads.