I like it a lot! I had around 290 chats. I unselected 79 I wanted to keep, then deleted the remaining ~214. It only got through about half before stopping, and when I went back to finish the rest, I had to manually uncheck those same 79 again since the selection didn't carry over.
Feature suggestions: (1) Shift-click or ctrl+click to select a range of chats at once, and (2) the ability to filter/select by specific character, since I have one bot whose chats I wanted to keep separate from a mass deletion.
