Vantaggi
You get to build rockets. On-site food, medical, dental, coffee, store, and frozen yogurt. You get to tell people you work for SpaceX and that Elon Musk is your boss.
Svantaggi
Yes, you get to build rockets but when the novelty wears off, the realization of the horrible work environment it is can be too much to bear for some. Underpaid, overqualified, and overworked. Extremely political and slow paced from a production standpoint. If you think you may be overqualified, you're probably right. The expectations or any sort of career roadmap of workers are non-existent. I've dealt with more drama at SpaceX than I did on the playground in 5th grade. The dishonesty amongst management and team members is ridiculous. Most employees have little to no integrity. Countless times I have heard the phrase, "You better look busy for the cameras." Then again, I suppose you should expect that in Hollywood. But if you do decide it's not for you and quit, don't worry some other poor sap will gladly fill your place with the same false hope you once had when you began. The cycle will continue, about every 6 months, because that's the average turnover rate.