gnappi, I gotta agree with Mike about the taste of this fruit. The tree looks nice with the dark red leaves, fruit looks like with the dark berry colored skin and pink flesh. But when I ate my Red Malaysian fruits, I did not think it was anything special to keep around. I found the taste of Mexican Cream better tasting. I just top worked my 2 Home Depot trees in 5 gallon pots and use them for my rootstock.
But it must be just everyone's personal taste since I have a good friend who swears his fruits are the best tasting guavas, and they like to make some type of juice from the fruits. He purchased his larger tree from a nursery (Moon Valley Nursery), maybe 5 ft tall when it was purchased. This tree grew very fast, now it is a big bushy tree after 2-3 years and he does get lots of fruits on the tree. The tree is about 8-9ft tall and just as wide, gets larger size fruits than any I had on my smaller potted trees. He waits for the fruits to drop (ripe) then eats them or make juice. Fruits don't get damaged since he has artificial turf under the tree.
If after reading all these comments from everyone, you still want to graft this variety on your tree, then send me a message, maybe we can trade cuttings for the Red Malaysian guava. I can go over to his house and ask to take some fresh cuttings for you.