Which office is better for extending a 30-day visa exemption, Krabi or Phuket for a US citizen?

A user is seeking advice on whether to extend their 30-day visa exemption at the Krabi or Phuket immigration office. Comments suggest that Krabi is generally less strict regarding requirements like the TM30 receipt, advising to choose the office based on the registered address. Users emphasize the importance of the associated area when filling out the application.