Hi everyone, here is my experience this morning in CW immigration. My Visa is tourist type.On April 8th I got stamp of under consideration by embassy letter, and CW immigration officer asked me to show myself on April 20th. So today I went there and got my visa extended successfully till May 8th.
There aren't many foreigners there in CW. I only waited around 30-40 minutes before noon.
Hope above information can give you a little help.