I harvested an Isis Candy tomato, today. There are a few ripening, and it probably wasn't the first to have started coloring. It wasn't as ripe as would be ideal, but I wanted to try it at that stage.
Anyway, it was sweet, but not super sweet. Sweet enough that I would describe it as kind of sweet, but not in the same class as Medovaya Kaplya, Ron's Carbon Copy, and such. Maybe the riper ones are sweeter (probably).
It had a tomatoey taste that was decent (and not so tomatoey that it's overpowering); I wasn't expecting a tomatoey taste for a bicolor cherry of its sort, but that's great.
I liked it enough that combined with its other features I do intend to grow it again next year. The fruit was orange-ish; that one didn't seem bicolor to me.
Location: SW Idaho, USA
USDA hardiness zone: 6
Elevation: 2,260 feet Profile post