The seedless variety is the best guava I've ever tasted. I don't know if it's Thai seedless or Indonesian Seedless but it's a medium sized fruit , about the size of a supermarket apple and it has green skin and white flesh. The skin is pretty lumpy and there is zero to several seeds but it is a low producer.
The fruit is very crunchy and much sweeter than the regular seeded crunchy green types. I got fruit from my uncle many years ago and my uncle doesn't speak much English and I don't speak much Cantonese so I didn't get much info from him.
if you can find this variety, definitely get it.
Simon