I know this isn't an exotic one, but I planted 4 vines of crimson sweet this year and I just cut up our second watermelon. 2 more should be ready in a week or so. I grow them for my family, as I dislike it myself, but outside of the space issue, I'm not sure why everyone doesn't grow them. I have had zero problems with them except for a powdery mildew issue that killed a bit of the plant but that was all. They're easy to grow and supposedly taste much better than store-bought (I wouldn't know, lol.)
I've enjoyed reading everyone's experience, it gave me a lot of confidence in growing the watermelons!