For the love of me, I still cannot understand why the location of the charging port is such an issue for millions of people.
Lots of Apple fans buy Apple products because of the looks - love it or hate it, the Magic Mouse has a sleek design - which wouldn't have been possible if the charging port was not on the bottom.
The above argument aside, it really charges so fast, every single person on this planet will, whilst working, take a 5min smoke break, or go and make a cup of coffee, or go to the loo, or whatever - in those few minutes, it can already charge enough to last you the rest of the day.
It takes less than 4 hours to charge it from completely empty to completely full, and if it has a full charge, it can last you for weeks (so is it THAT difficult to put it on the charger overnight, ONCE or TWICE per month? We plug in our phone/laptop/watch etc daily?). If you can manage the charging of your phone or laptop to meet your specific needs, how much easier is it to do it with the mouse?
Lastly, would anyone want to use it while it is plugged in and charging? Does that not negate the whole idea of a wireless mouse? Are we back in the early 90's??