How was your experience renewing a retirement extension with CM Immigration?

Just a great Thank You to CM Immigration. Renewing my retirement extension. Into Bank at Sankamphaeng at 8.40, have letter by 8.50, arrive at CM Immigration 9.30. not busy, maybe 30-40 people at most. Helpful volunteers outside to check the paperwork, Inside, checked again, called immediately to a counter , processed and out by 10.10. Just to add, I changed banks about 5 months ago from Bangkok to SCB as getting a 1 year letter from Bangkok Bank takes a week and of course is out of date. SCB printed it off there and then, but it wasn't for the complete year. I had got a bank letter when I closed the BKK account. Immgration were willing to accept just the SCB letter which covered 5 months, but were very happy to take the older BKK letter too. So, if changing banks, be sure to get a final letter (not statement) from the bank as the account is closed.