As for the seeds I agree. It's like eating kiwi seeds.
Mangosteen is great! No idea why the author had so much hate.
Durian though ... well I've tried it about 7-8 times and I get that it "tastes" good but I still don't get it. For example in Singapore there is a chain of cream puff stores that carry durian and vanilla cream puffs. To my "unrefined" palette they taste 95% the same but one stinks so if I was to go again I'd choose the vanilla that doesn't stink vs the durian that does. I'm sure I'll try them again but I suspect my reaction will be the same. Tastes fine (like vanilla custard) but why put up with the stink when I can just have vanilla custard.
That said, last summer when I was in Malaysia was the first time the smell started not being so repelling so (a) I'm getting used to it (b) they were in season (c) like the cat virus they've reprogramed my brain :P