I am a huge fan of the original Pokémon series on TV and the games on the GBA so it wasn't a big surprise to me that I loved this game from the start.  This hack is very thorough, getting down to the nitty-gritty details of Ash's adventure.  I did get stuck a few times when I didn't remember Ash's original route but otherwise the game was pretty easy to understand.  
Unfortunately, the game did freeze on me when I was on the Cycling Road.  My character wasn't able to move or talk to the person in front of me, so there are a few kinks left to work out.  I'm tempted to start a new game on Ash's quest because I liked it so much and hopefully I won't run into the same problem.  
I really liked the details the game went into as a part of Ash's Quest.  I enjoyed finding Squirtle, Charmander, and Bulbasaur and was able to raise them.  Also, the fact that Jesse, James, and Meowth were in the game just made me giggle, they don't blast off into space, but it's definitely something that I missed in the original GBA games.
I fully recommend this game and I hope others have as much fun as I did. I do suggest though that people keep a walk-through guide on a tab on their computer as that helped me a lot when I got stuck. This is a great hack, good job!!  

I tried it and found it decent, but only got to first team rocket encounter. I wish there would be an actual game that followed Ash's story, not just a hack

This game is quite similar to Pokemon Ash Gray. Why can't they have the whole thing? I wanted all the Pokemon seasons and update them.