People tend to check in during these times:
Beware the time of picking up too, that it in after noon or morning.
1day:2700, 2-3days:2300, 4days normal 2000 -:-)
Bring copied of your passport when pick up
Always come before 4:30 pm, otherwise it would be close. Also consider that they close on Thai and Vietnamese holidays
Business Visa: Single entry = 4,000 THB, Multiple entries = 4,700 THB