Maybe I should ask the "bad" that you see, after all I am far far from vested or knowledgeable in this.
I think it provides well balanced compromise between selection by congress and direct election by citizens. The best of both worlds if you like.
PraegerU has a nice short video itemising the pros.:
- protects against tyranny of the majority (though there are already some erosion via legislation)
- encourages coalition building (of the States)
- discourages voter fraud or election stealing (by spreading the risk, you have 538 electors, though there - has been some poorly chosen electors whereby you got unworthy back stabbers (aka faithless electors))
I've also read some pros and cons - example from
The Pros and Cons of the Electoral College - SmartAsset but I reckon the cons presented are weak.
Here in Australia we have a Prime Minister selected by the members of government namely the Lower House, generally the Leader of the winning/majority Party. The actual person appointing the PM is a representative of the Queen of England. Anyway we citizens don't get a say and worse, at the whim of the polls (manipulated probably), the party can get spooked and PMs can get booted out and replaced with someone else. Imagine that... 5 Prime Ministers in 5 years.