A post-script to this older thread. We saw our first GT Twin today - our local Holiday World got a 2016 in, and we took a tour. A few observations, because the GT Twin is the closest living relative to our 2007 T1N Rear Sleeper (RS), and some of this perspective might be relevant to people who are considering Twin vs. other options including the rip it apart / self-upgrade option where bedding is concerned.
(1) Obviously there are many more posh features to the 2016 GT versus the 2007 RS, but both my husband and I prefer our 2007. It's less claustrophobic, the bathroom doesn't stick out and restrict the aisle width, and the overall cabinetry feel is much less ominously heavy in our T1N (and not as intensely masculine). My husband continues to lament what he swears is a lower ceiling height in the T1N, and I would love to have that larger GT fridge if it worked reliably, but on balance, I would not be inclined to trade even if I were offered an even trade.
(2) The Twin's mattresses are no bueno in my opinion. Neither comfortable nor versatile. If we ever ended up with a GT for any reason, they would have to be replaced. I don't even see how they could be supplemented with additional materials to overcome their shortcomings because they are structurally not what either my husband or I need to sleep well.
Obviously bed comfort is a matter of personal taste and it has been discussed ad nauseam on other threads, this next bit ought to give you an idea of how much we like sleeping on the T1N's jack-knife couches. On our recent US-Canada trip, an entire large master bedroom with a custom mattress on a queen sized bed was reserved for us at the cottage my family was sharing. We turned it down - we slept in the Interstate in the driveway. That's how much better the T1N's jack-knife couches are vs. most other options.
The point being, one doesn't have to live with crappy Class B bed quality - better options are out there, somewhere. My husband says our couches have an Atwood tag on them. I plan to run down exactly what product that is, for future reference.
(3) The GT Twin is indeed a true 2-seater - there are only 2 seat belts and it does not appear as if a modification could be easily done to correct this. That's a non-starter in my opinion. It's just not necessary - it removes so much versatility. No way I would be working in the rear at my computer desk
in a GT Twin. Our 2007 has 6 seat belts plus the ability to place a pedestal table in the rear.
(4) This disturbed me mightily: The Twin's couch beds were intended for one-way sleeping only - heads toward the rear doors (because there is cabinetry obstructing the opposite direction). This would not work for us as mainly-boondockers for the following reasons:
(a) We tend to flip end-to-end at will if I'm too exhausted to level the Interstate when we arrive at our overnight stops (boondock spots are rarely level and head must always be uphill). Being too exhausted occurs on a regular basis, so this is important. Easier to flip the bod than to flip the Interstate.
(b) If we sleep with the doors open and rear screen in place, obviously the feet must be toward the doors because if the heads were toward the doors, the pillows would probably fall over the edge of the bed and onto the ground below, because there is no headboard-style stopper there. Nor would I wish to over-complicate things by adding one.
Nor would I want my head toward the doors with them fully open. If something approaches the Interstate in the middle of the night (animal or human), I want to be able to sit bolt upright in an immediate defensive posture, facing the open doors.
(c) If it's really hot and we're stealthing in a public place with rear doors shut and in lieu of open doors we are instead cranking the Fantastic all night long, heads are always toward the rear doors because it's quieter that way (ears are 5 to 6 feet further from the noise).
(d) If it's really cold (approaching freezing), feet are always toward the doors because the air pocket near the door is much colder than the middle of the Interstate. Sleeping bags have extra insulation in the foot chambers so this works out perfectly.
^^ Little things, but for boondockers, the quality of life difference is quite perceptible when these general guidelines are abided by. It makes the difference between a better sleep and a worse sleep.
Those are a few mostly-bed-related observations that might be relevant to people who are considering the GT Twin model, especially if they are inclined toward adventuring and boondocking extensively.