One touch of a mangosteen segment to your lips, and you will understand what manna tasted like.
After you carefully cut an opening into its thick, fibrous rind, you will find a supple treasure within this tropical fruit. A mangosteen is divided into segments, just like a tangerine, and has one (or two) medium-sized seeds inside each segment. The fruit flesh of a mangosteen will melt on your tongue, releasing its abundant, honeyed juices in a flood of deliciousness. The flavor of a mangosteen is subtle, and less concentrated than a dragon eye (longan fruit). I would say that its texture and taste is almost like a cross between a juice-filled loquat or lychee, and with the finish of a soft, ripe (but not overripe) banana or a very ripe and non-gritty pear.
If I had to compare a mangosteen to our everyday fruits as available in the local produce market, I would say, imagine a slickly lubricious, non-fibrous, and incredibly juicy citrus fruit with a soft, melt-in-your-mouth banana-like interior. But way, way better.
I hope that "the Mangosteen" has encouraged you to be more adventurous at your local farmers market or while inspecting the exotic area of your supermarket's produce section. You never know what treasure you will find there.