I think the cost of the charger alone is worth the purchase. If you have an old school galaxy Tab S4 like me, this is a no-brainer.
I think you can click and collect if your nearest store has stock.
Stay safe all!
Edit: The dock is compatible with both the Galaxy Tab S4 and the Galaxy Tab A (2018, 10.5) - Thanks decc0!
If anyone has a 10.5" Galaxy Tab A 2018 model they can also use this