I've never had a problem with AB, but they are quite expensive and SLOW (even considering their one-off April shutdown - which may fix some of their speed issues). I do definitely trust, based on many pod, phyto, and chaeto orders, that it is clean. Had a tisbe culture crash this week and just placed an order with PodYourReef based on what I've read here. Thanks guys!
Finally, ordering pods is just crazy expensive over time (have 3 dragonets), so I culture my own. The system from Poseidon systems (link below) is really awesome in my opinion. Seems a bit crazy starting out with the plastic bags and such, but once you get into it it's really brainless and easy. I have two systems and harvest phyto and pods weekly on Mon and Thurs mornings - takes maybe 30 minutes. They're not cheap at all, but the ease, reliability, and savings definitely make up for it:
https://poseidonreefsystems.com/products/phytotank-cl-copepod-system
Oh, one more note - I've always liked
https://copepods.com/collections/shop also. Have never had a problem and their stuff comes loaded with phyto so they stay healthy for the trip (AB doesn't, it's clean water - a tradeoff I suppose). Historically, for the price, if I'm ordering pods it's copepods.com (but we'll see about PYR).
My $0.02, HTH,
G
P.S. Want some craziness? Get the pods+rotifers from copepods.com and dump them in your PhytoTank. WOW - SO MUCH LIFE!! Ended up stopping as the most successful pods were the pelagic variety, not benthic, but still. . .it was nuts.