Easy to put together. Far too easy to drink. The first one I always down in no time at all. Then between every next Mojito I just top the glass up with soda water for a sweet minty sparkling water which I tend to sip and nurse for a bit until the next one.
Minty soda water is also a good way to stretch out the remaining ice in Summer...it's a precious commodity unless you have a massive freezer somewhere (or even a smaller freezer NOT stuffed with your frozen excess harvest of Summer strawberries...).