The vast majority of the seeds in the jaks I eat end up in the compost pile. I cook a batch or 2 per year. Boiled, they remind me of potato. There are probably ways to cook them that are better tasting but I am really after the fruity taste of the bulbs.
It is fairly common for jakfruit to have a few bulbs with undeveloped seeds. These mostly taste the same as the bulbs with fully developed seeds. The fruit from my tree pictured above was very good to excellent. My fruit happened to ripen the day before my family left on a week long vacation. I ate half that night and put the remainder in the refrigerator. After we got back, I didn't touch it for another 3 days expecting it to be pretty far gone as most jaks will start to decline after 2-3 days. At 10 days, I expected it to be trash. I was shocked to find it was still in prime condition and I ate the entire second half in one sitting. Maybe it was unrelated or maybe removing seeds would help jaks stay fresh longer. I am too lazy to properly clean jaks so I don't know if there is really any benefit.
The advantage of a seedless jakfruit is a reduced cost for the amount of edible flesh since you are not paying for seeds. Regular jaks are 30 - 40% edible flesh. Maybe a seedless fruit could bust 50%. My fruit looks like it has a high rag percentage but that is because the bulbs were not bloated with seeds. I guess I will know in a month or two if my first fruit was an oddity. If the seedless trait continues, I will do a proper cleaning and weighing.