I have played two Balaguers, the SD and the Hyperion. The fit, finish and sound were all fantastic. They were both very nice and one of the better sounding guitars I have played for certain.
The only negative for me was that I was not a huge fan of the C shape neck profile but that is kind of a personal thing. For me the Charvel necks are perfect and the Horizon is the absolute biggest I can ever go as a disclaimer.
Balaguer has a thin D type neck that is definitely on my list to try. From checking out the specs and seeing different discussions about them I feel that the thin D neck would be great for me but I have not got to try one yet.
A bit off topic but the pickups are great too. I replaced a BKP Miracle Man with Balaguer Ferals and the Ferals sounded WAY better once I got it dialed in to my liking.
As a personal opinion. I can also say Joe is a stand up guy and I would not hesitate to deal with him again. I don't know him close but I get the impression he believes in quality but also top notch service. He is a player too so I think he has seen the ups and downs of other small builders, is a smart guy and does things the right way.
I have been tempted so many times to get the Archetype Overlord but I am not really a 7 string kind of guy. One day I would like to get it anyway.
That is really all I can say. TL;DR Joe is an awesome dude and his guitars sound and are built really nice.