I just did front & rear crossovers, water pump, and the large top hose from top of radiator to crossover pipe on my 13' LR. I was at 135k miles with no leaks or loss of coolant all on the original water pump and rear crossover with only the front crossover and thermostat being replaced at 90k miles. Used a little more than 1/2 a gallon of coolant. All is pretty easy, took me just under 6 hours to complete. Getting to that rear crossover was a pain and took the longest just like others mention on here.
One thing I don't see very many people mention or mention very little about it when replacing the water pump is the little plastic elbow fitting that goes into the water pump (small bleeder valve) coming from the thermostat hose to front of water pump. You got to be very careful when removing it (I see it mentioned but not clear enough on how delicate it really is) as it does not come with the water pump or sold separate, you have to buy a whole new small hose assembly $70 for a $0.02 cent elbow and this thing literally disintegrated and crumbled into tiny pieces when removing and I was super careful as I was already aware when watching this video and others. Luckily my local dealer had the assembly in stock, if not, that would have stopped the job and caused delays waiting for parts to arrive. May be a good idea just to order it new on high mileage cars.