It's not perfect, but it's a lot better than nothing. But it's not perfect. I've had issues with the plugin simply spinning until it times out when I ask it to fetch translations from Smartcat. <strike>It would also be nice to be able to have multiple source/target columns for a given language in a single spreadsheet, though I do understand why this might be the way it is.</strike> EDIT: It turns out you CAN have multiple source/target columns within one spreadsheet, but doing so requires making multiple projects and switching between them. The "Templates" function is HUGELY beneficial for this, because for some reason the project settings do not actually save which column is which. Overall, though, it is by far the only Google-sheets-compatible CAT option I have found so far.