You can use
https://coinb.in/#fees instead for a more conservative estimate. The tool you're using shows the cheapest
and fastest fee, so it will always be a little higher than what you could get away with. The coinbin one, on the other hand, suggests a fee just good enough for the next few blocks so it's perfect if you aren't in any hurry.
The whole thing was almost implausibly good.
I know right? It works on every corner of the globe too. The problem is that fees could inflate when the network is subjected to too much load. Once that problem is solved, it can be a serious and disruptive competitor as a payment system. Let's see people call it a bubble then lol.