Great extension that I use all the time. I realize this is free so just want to drop a few suggestions to consider if you spend any more time developing this extension:

1. A cancel option would be great at the Delete original object prompt, i.e. Yes / No / Cancel. I realize a ctrl-z will undo the mirror, so if it's too much effort/time to add the feature, then I will continue using ctrl-z.
2. Any way to use the native / (divide) command after the mirror? I often draw a screw or bolt at a location, then mirror it about a plane, then want to add evenly spaced ones in between. currently I just copy the original item onto the mirrored item, then use the / command, then delete the copied one but if possibly immediately after using mirror that would be a time saver.

Again, thanks for such a great extension.