Just adding to this and seconding others from other threads. I've drained and filled the coolant on a few different vehicles the manual way and it is always a pain in the butt. I used the vacuum fill for the first time on my 2016 LR4 when I did the rear heater manifold and the water pump, it was totally painless. I had followed the shop manual procedure which says just drain from the lower radiator hose then refill with the vacuum, heat up and run the heat full blast.
Best part about the vacuum was you can find leaks before filling the system. If it can't hold a vacuum then there's going to be a leak. Likewise if it holds a vacuum, you can have some confidence in refilling the system. First time I pulled a vacuum, it wouldn't hold and I easily found I had a leak at the little plastic elbow (was cracked) on the front of the cooling pump. With it being a Saturday, had to find the only open LR dealer and buy the whole hose assembly to get that little elbow. But that was much better than filling it and pouring coolant out of the front of the water pump and having the car out of commission until Monday afternoon.
Anyway I used this system from Amazon, I'm sure others work well too but this was recommended:
OEMTOOLS 24444 Coolant System Refiller Kit
Also a video explaining how to use it, which is similar for most cars:
Saved many hours of time, refilling, putting the car up on ramps, holding the reservoir up high while running the heat hot, etc, always carrying a bottle of coolant and checking level at every stop.
Only caveat I found is the shop manual says use the vacuum filler to fill to the max line on the reservoir. That wasn't nearly enough, I filled it much higher, probably 1.5" from the top, and then still had to add coolant after the initial full heat up and engine run. But after that initial run and fill back to the max cold fill line, I haven't had to add any more.
Definitely worth the cost for a one time job, and if you expect to drain and refill coolant more than once (typical on these vehicles) it's a no brainer.