Chempedak is the stinky cousin of the jackfruit. If you like durian, as I tend to, you could possibly fall in love with its special funky aroma, lol.
Unfortunately, from personal experience, a chempedak seedling is one of the most difficult tropical plants to grow in a subtropical climate. I had personally seen the leaves begin to wilt at just the slightest dip of the mercury to the mid 50s (F). And if that weakness alone isn’t enough, it is also highly prone to root rot. The growing medium should be an above average well draining mix to even have a chance at growing that ultra tropical. On the flip side, like its hardier cousin the jackfruit, fruiting can take as little as 5-7 years. There are even rumors of seedlings in prime condition beginning to flower in 3-4 years...