I've just finished my tenth night in the current-model Six Moon Designs Lunar Solo. Some brief comments:
I'm 180cm tall, and the tent is only just long enough for me. I would advise against it for anyone taller, or anyone who uses a mat that's thicker than a NeoAir. It has a HUGE amount of floor space to keep gear inside, though you can't sleep a child in that area because the roof is low. It took a while to work out how to pitch it well, but now it's the fastest tent to pitch that I've ever used. It DOES stretch - you definitely need to tighten it up just before going to sleep, but after that it stays taut. Two of the nights I've spent in it were in heavy rain, and it was absolutely waterproof. There was condensation inside, but I just wiped it down with a Chux cloth when I woke up in the morning. None of the condensation made its way onto the floor.
The Lunar Solo has no internal structure, so you can easily stuff it for a quick pack-up. It's robust, having a 20 denier roof and 40 denier floor (not like the 10D and 7D fabrics being used on some tents). You have to seam-seal it yourself, which is a pain, although if you buy it direct from SMD you can pay to receive it already sealed.
It doesn't come with pegs, nor with guy ropes for the two tie-out points (optional, but you need to use them if you are taller than, say, 175cm). The all-up weight of mine - including pegs, guys and seam-sealant - is 850g.
It's an elegant design, at a sensible price. And yet, if they would make this exact design in DCF at double the price, I would buy it in a heartbeat.