I have the double rainbow. I had mine sealed by Henry before delivery (don't know if he still does that). I put it up in the back yard to see how well sealed it was. We had a thunderstorm to end all storms followed by a day of straight rain and there was ZERO water inside.
We took it up to Pictured Rocks National Lakeshore to hike from Grand Marais to Munising. The tent was perfect. We had no rain but it set up quickly and had no condensation problems although we keep the sides wide open since it was a bit warm. With the sides up it is very comfortable. I would only put more silicone on the floor as it was a bit slippery even though Henry put some on the floor. I can't rave about the tent (or the service from Tarptent enough). Just a plain well thought out, well put together product.
PS Do Pictured Rocks and try it in late August or September when the bugs are not too bad. Let us know how you do.