An AC hybrid nest is definitely an adequate formicarium. While definitely not the best on the market, if you already have one, there's no reason to get rid of it. The main issue I have with the hybrid nest is that while they appeal to newer antkeepers mostly, they are absolutely massive. A newbie trying to move their Camponotus colony with nanitics into a whole hybrid nest isn't exactly what we like to see in the hobby, and so we normally encourage newer keepers to stay away from AC's products. However, if you actually have a colony that will fit in one of the hybrid nests, there's no reason not to use one. The build quality is fine, they work pretty well and offer a decent amount of space for the price point. I'll never tell anyone to buy AC over THA or even Aus Ants, but it's not like hybrid nests will instantly kill your ants as soon as you move them into one.