"Cons? some people think they're flimsy"

It's not flimsy; I've carried a Contrail for a lot of miles on some long backpacking trips, and it's still in fine shape. Like any but the more heavy bullet-proof gear, you have to take some reasonable care. Perhaps the folks that think the Contrail is flimsy yearn for the days of packing in canvas tents on mule back or something ?

Condensation depends more or less on the conditions you hike in, but also on site selection, as well as just general expectations. In WA state where I live, occasionally I wake in the middle of the night and use a little micropore towel section to wipe the inside of the tent. In a drier climate, no worries. If you live in a climate or tend to hike in conditions where condensation is more of an issue, you might consider instead a Lightheart Solo.

As far as I can tell, the reason that such lighter tents aren't more common is just that they're not very well known. (?)