What a great manga, feels good to finally have read a story with a consistent plot again, only moderate fan service, plenty of action, one of the best art I've seen in the Shonen / Action genre, several very likeable characters and still considerable depth (good physics, it's clear the author knows science and relativity - also has some nice philosophical touch (but not "too" much over-the-top).

All in all, one of the best manga of the last ~ 25 years or so, highly recommended if you still haven't read it :)