I made a 2 person bilgy this summer and have been happy with it, mostly because of the low weight.
This weekend was our first encounter with heavy dew however, and it has me concerned. Despite the generous ventilation, condensation formed inside and out, continuing through the night. By morning we had about a cup of water in a pool at the foot of the tent.
Water would condense on the underside of roof, run down to the no-seeum walls, continuing from there to the tent floor and on to the lowest point which fortunately was the foot.
Water in the tent is never a good thing, and with a down bag, it's downright scary. I'm thinking some sort of diverter like piping where the mesh meets the tub that would make the path through the netting the one of least resistance is in order.
Another issue is the slickness of the silnylon tub floor. The instructions recommend painting silicone stripes on the bottom to prevent slipping. We tried that, and later painted stripes on the outside of the bottom too, but if the tent pad slopes at all from side to side, you and your partner will end up packed against the low side.
That silnylon is slick stuff! Sloping from head to foot doesn't present the same problem. I'm not sure why. We've been careful to orient the tent on the pad so it slopes only from head to foot which at least saved us from sleeping in a pool of water.