Very good and accurate. I’ve had button quail before for years and this is a fantastic guide! It’s easy to read and covers almost everything you need to know about buttons, I recommend it to all the beginners I know.
It is a pretty good guide but there is some false information. Quail should not be kept on wire floors because it can really hurt their feet and cause issues like sores and bumblefoot if it isn't coated wire. Everything else is pretty good though
Wire floors are perfectly fine if it is a smaller size and they have things to climb to rest their feet on which mine have plenty of and is very clearly recommended in the article :)