From March 20th, 2017 to June 12th, 2017, 50% user give 5-star rating, 50% user give 1-star rating. for Spreadsheet to JIRA chrome extension.
if a table cell has any bulleted points or more than one lines. it just messes up the entire formatting. not usable
I use it all the time. Don't know why it isn't built into the Rich Text editor JIRA uses.