I know this is kinda late, but it's just now that I've thought of sharing my experience with Guitar Hospital AND Guitar One.
I first when to GH, and it was my first time having my Godin set-up since I purchased it a few years ago. Nagkaron na kasi ng matinding fret buzz and naging sampayan na sa taas ng action. My impression is that Arie is a good guy, very knowledgeable, and apparently, very skilled (according to the accounts of everyone else). I consulted him about my guitar, he explained A LOT to me (much of it was unnecessary, though), and I ended up having a re-fret done. Well, my guitar DID need one badly. I left my guitar, and came back in three days to pick it up, and I was satisfied. I went home, played on it, and three days later, the neck seemed to have moved, and balik na naman si awful fret buzz and high action. I went back to Arie a couple of days later to have it fixed again. When he was going down to meet me downstairs, I heard him talk to a guy (na mukhang trabahador - I'm not judging, but you'll get it when I'm done explaining), who seemed to be someone who he was employing.
Medyo tumaas kilay ko, kasi I heard Arie say, "Ah, eto ba yung gitara na may ukab yung fret...?". I thought, diba siya yung gumagawa ng mga guitar jobs? So, why did he talk as if he wasn't the one who worked on it? I didn't want to jump to conclusions right away, so I just gave him the benefit of the doubt. Anyway, so I left my guitar to have it setup again.
A couple days later, I came back to pick it up. Hindi naman ako siningil ulit. I was in a hurry so I didn't get a chance to check it there. Later that night, at my place, I tested my guitar. I was shocked. Kasi ang pinaayos ko kay Arie, three things: re-fret, lowering ng action (shredder ako), and fret buzz. When I returned my guitar to him nung nagka buzz ulit, what he did to my guitar the second time around was very disappointing. Para matanggal yung fret buzz, all he did was increase the action of my neck, at ginawa nya ulit sampayan. Shinortcut nya, para lang matanggal yung buzz. Ergo, I was very disappointed.
I came to the conclusion na pinagawa nya lang yung gitara ko sa tauhan nya na muka lang trabahador and hindi mukang sanay sa pag setup ng gitara. I COULD BE WRONG, but that was the only logical conclusion, kasi it wouldn't make sense na sobrang poor yung quality ng work, given na siya ang tinaguriang best na pinoy luthier.
After that, I just went to Jon de la Cruz sa Guitar one (E.rodriguez, QC). Nagulat si Jon sa fret job na ginawa ni Arie (or ng trabahador nya), kasi sobrang sablay daw, and he explained to me why. Yung pag shape sa frets, yung pag level, yung angle ng neck, yung level ng bridge pins, etc. Everything was wrong. Anyway, he fixed my guitar right in front me, right then and there. Everything was brilliantly done in a little over an HOUR, and months later my Godin is still playing like it was new, even better. Hanggang ngayon, my Godin is still playing like a dream. Jon dela Cruz is brilliant.
I'm not bashing Arie, because I still believe that he is a very good luthier. However, I am presenting my experience objectively, as it actually happened, and it is up for you to form your own conclusions.