[LAD] jack-midi? what are the benefits?

i was following the discussion on technical details.. it was interesting and i learnt a few things.. still not enough to put it into any code.. i sort of sorted out what is the jack-midi about but was trying to play a bit stupid (sometimes i can't stop that game even when i want ;)) and fnd something on mailing list or web site... couldn't find it.. these would be the questions: what would be the benefits of using jack-midi over alsa sequencer? is that related to jack transport somehow? how? is that better timing? why? is that better integration/sync with some other jack events related to time? which events? it would be great if answers are not just 'yes' ;) but i'm not really looking for more than one sentence for any question... i can then format it into something which then could be put on the web site... hope this is not too much of wasting time of developers... thanx