Definitely one of the coolest little places I've stayed. I grew up seeing Airstreams every now and then on the road and parked in driveways, but never stepped inside one. So I had to jump on this one...!
Peter did a fantastic job renovating its interior to create a comfortable space. While the A/C can be pretty loud at first, you get used to it after a while. And it's powerful! Perfect for beating the heat of this city.
The pullout bed was surprisingly comfortable, and I enjoyed catching up on Netflix while resting for the night. If you want to cook, they have all the kitchen utensils you could possibly need.
The neighborhood is very quiet with no troubles that I noticed. Tobin Hill is a bit of a historic district, so you can find some new houses and recently renovated/restored ones if you take a walk. The Airstream is only about a 10-minute walk from downtown, and 10-minutes to some other bars and restaurants in the Tobin Hill area along both North Saint Mary's and Main Street.
If you're over 6-feet tall, you may still fit. I could stand and walk around the space just fine, but the shower stall is a bit small. (I'm 6'1".) Anything more than that and you'll feel a bit like Alice in Wonderland.
In closing, do check this place out if you get the chance! The hosts are very responsive and the space itself is charming to experience.