Kai,
how is your Rocket Tent holding up? After only a shortlifespan, my rocket material started delaminating where the inner started peeling away like glad wrap. Problem only got worse over time and Brooks Range replaced it with a new Propel tent (same dimensions) and it's held up very well for me after maybe 30 nights. Unfortunately it sags more than the cuben but at least it cant delaminate.
i'd be interested to hear about other user's experience with the rocket tent long term.