If anyone is interested in finding out what does a Guaya taste, well here is the explanation from another point of view, the point of view of somebody not Mexican, I copied it from Mexpat’s blog.
Ever since I found the Guaya, Handmade Goodies blog I’ve been wanting to try a guaya. Since Jordana said it’s guaya time, I decided to head over to the main square here in Playa del Carmen and see if the fruit ladies were selling any. Whadaya know, they were!
I bought the bunch you see at top for $15 pesos (roughly $1.50 US) and asked the lady to show me how to eat one. Basically, you stick a fingernail into the side of the guaya and the skin cracks open. The skin is thin, but tough and almost looks like a lime skin, but there’s no thick, white part to it.
So you crack it open and it reveals this little orangish-pinkish colored fruit. It reminds me a lot of the process you use when eating a lychee berrie, in fact, I wouldn’t be surprised if guayas are remotely related to the lychee.
Then you squeeze the pinky-orangy fruit into your mouth, much like a scuppernong (for my Southern readers). Sorry Northern readers, I can’t think of anything similar except a lychee.
The fruit is probably 80% seed. There’s huge seed inside that is white. The flavor isn’t like anything I’ve ever tasted, really. It’s sort of bitter sweet, or sweet and sour. I can’t relate it to anything really, except maybe a SweetTart, but not as sweet.
The flesh is very stringy and the whole thing isn’t really juicy or anything. It’s sort of hard to separate the flesh from the seed, so I decided just to sort of suck the flavor off of it and just bite a little at the flesh. It’s not the sort of fruit that will fill you up, it’s more like a snack you would eat for the flavor- like candy.
Hubby thinks it’s an acquired taste and he hasn’t acquired it yet. I think I acquired it by the second one I tasted. I don’t know if I’ll run out and buy them every week, but they’re pretty tasty and I’m glad I gave it a shot. Yet another cool, Mexican fruit.
guaya.wordpress.com 
Thanks for the shout out! Hey- we were in Puerto Morelos yesterday and decided to swing by to see progress on the taco place. Is it the yellow shop across the street from the Posada del Amor hotel?
Articles written by bloggers is perfect, the first collection and subscriptions, and I’ll be reading your site every day to Oh ;-)
This is actually not only a “Mexican” fruit. We in Puerto Rico call it quenepas (Kenepas). Honestly the are many different Latin countries. But frankly I think that the ones from Puerto Rico are much sweeter and taste so good. I can eat them all in one sitting except they can stain your clothes if the slippery sucker falls on you while cracked open. This is actually my favorite fruit in Puerto Rico. My aunt has a huge tree in the backyard so I don’t have to pay for them but i do have to wait until they are in season. Great choice!