The biggest problem with "conditions," in my view, is that we always think of them as something negative. There's no really good word to describe one without making it sound like, well, a disorder. Trying to describe synesthesia in neutral terms as "it's a condition" is kinda pointless.

I do, however, like having a name put to something that I've always thought just meant I had failed at some basic aspect of life, like sleeping. Knowing that it's been recognized as something that happens to people is something of a relief.