Just entered Thailand on my DTV from Manchester. Online full check in was not available, I could pick my seat but it instructed me to go to the desk for boarding passes, even the little machines before the desk would not allow it. The girl on check in hadn’t seen the dtv before but she just typed in the visa number and it was not an issue.

On arrival in Phuket my passport was stamped for 180 days, but after me asking the immigration officer said I have to report to the immigration office at 90 days.

It’s not a problem doing that but if people are coming for the first time they may not be aware of the 90 day reporting