I have owned both the Contrail and the Lunar Solo. I prefer the Lunar Solo because of the side entrance and generally more usable footprint. I still have the Lunar Solo; I sold the Contrail.

I have had condensation problems with both of them, mostly on cool, clear, nights in places like the high Sierra. The condensation was not too bad but was definitely a presence. Because the sleeping position of the Lunar Solo puts ones face nearer the fabric, you can get a face full of cold water if you don't think about it before you try to sit up.

I now mostly use a Big Agnes Fly Creek. It is only ounces heavier than the Lunar Solo and has the double wall feature. It is a bit more snug than the Lunar Solo but also a bit warmer. I wrote a review of the Fly Creek on Trail Space if you are interested in this tent.