King's Indian Attack! (Good or Bad?)

Honestly I think the King's Indian Attack is pretty good because it starts with the Reti Opening 

(One of my favorite openings) the King's Indian starts with 1. kf3 2. g3 3. bg2 4. King castles 

                                                        I hope you enjoyed this tip!

Yes, it is good.
Example: https://www.chessgames.com/perl/chessgame?gid=1883445

It is a very good attack (in my opinion). I like the fianchetto too.
For example: https://www.chess.com/game/live/108879556314

In my own experience:

The King's Indian Attack works quite well against defensive systems where Black locks in his c8-Bishop with e7-e6... against defenses such as the French or the e6 Sicilian lines.

Against systems where Black develops his c8-Bishop to g4 or e6, though, the King's Indian Attack is only situationally useful.

Here's a game of mine where I played the KIA against a French: