Morning is when the European flights come in. A couple of 747's before you and there is a huge que at Immigration. Seems like almost all of the passengers are transferring to domestic flights to Phuket or Krabi. Anyway you should have more then enough time "if" your flight is on time.

If you are delayed then grab a hold of the first TG rep you see and they will escort you through the que's. If you are on time then don't worry they won't leave you behind. I have been stuck in the immigration que for 45 mins once and towards the end they called out for all passengers traveling on my flight. There were quite a few behind me and they got pulled into the front of the que.