Forgot to comment about the taste... in a few words, "very good" to "excellent"... sweet, a little bit acid, one of those fruits you can eat a full bowl at once if you have them available... taste is not immediately comparable to any other myrtaceae fruit I had before, and I already tasted a few ... definitely no strong taste as I've always read it was supposed to find in klotzschiana fruits... and this is another clue indicating this is in fact E arenosa.
I will be planting those seeds for myself as this is one of those species that you should have more than one plant!... no doubt about it!