Which Logitech one is it?
I said which one it was in my first post V270
I think you'll find most people use Mighty Mice because they are Apple and they match; I doubt anyone could honestly say it's a brilliant mouse.
For alternatives, as above, the Logitech I use is well regarded on here and on other Mac forums. Small, but not too small, tracks well, lasts ages on batteries, has an on/off switch and the Bluetooth connection doesn't drop out.