I haven't heard great things about Repashy. From what I've heard it was a good food until they changeed their forumla a few years back. Many people have said their geckos refuse it now and many have also said they had a lot of egg death and fertility issues the season after it switched. I don't feed it.
I haven't heard anything about or tried All Living things but none of the breeders I've talked to mentioned they use it or recommended it so I tend to think it's not a good choice.
I feed a mix of Pangea and Clarks. My small group of 6 cresteds seem to like them both - maybe the Clarks a bit more but I like to provide variety. You can buy it at: PMP Reptiles. I think Gecko Haven may sell it as well. Pangea can be bought directly from their company: pangeareptile.com
Hope it helps!