Detention hearings are great opportunities not only for release but for discovery. The government begins with the burden in every case, so their agent must testify. Your attorney can cross examine the agent on key facts and circumstances of the case. You can dig for critical pieces of evidence relevant to the hearing, since the weight of the evidence is a factor the judge must consider. For this reason alone, a waiver should be avoided if no outside holds exist.
If the court denies release and orders detention pending trial, a person has the right to appeal the decision to the Article 3 federal judge. The presiding judge hears the case de novo, which means they make their own ruling on the evidence. The percentages of detentions getting reversed by the District Court is very low, and the subsequent successful appeal to the Fifth Circuit is virtually nonexistent, so it is very important to hire a lawyer who knows how to most effectively present your case for release in the magistrate court.