Almost a month after I submitted the manuscript and I was nervous regarding how many mistakes I may have to correct. Turned out the corrections were simple and easy to correct. I was also impressed by some of the items that were caught and/or corrected.
For example, I had the wrong name of the group that sang the song "I Shot the Sheriff" and they caught it. Also, I inadvertently used a wrong last name of a character late in the book which was caught by the editors.
Some of the items were preferences and it was up to me as to whether to change the wording or leave it as is. Such as slang words in a sentence such as "Gimme a break!" vs "Give me a break!"
At any rate it took less than two hours to complete the requests and send my responses back to the copy editors.