Thanks for the reply and info. Since we still tent and hammock camp...not being in the bus or travel trailer isn't a big deal. We are looking for a compromise between all of the above. Lighter weight and low profile for easy towing, etc. We have owned several conventional popups (even while owning the others). I love towing it...but don't like the canvas, etc. This is what is drawing us to the TM.
We do travel frequently on dirt roads and it sounds like the inside walls of the top halves could easily get very dusty.
Thanks again for the info and gracious replies. Still trying to learn more about the TM.