Bathtub floor is great atmo. I don't use a groundsheet, but I did with my Hubba Hubba. I'd say the Tarptent is tougher.
The Tarptent Contrail needs some support down its spine to keep water from pooling over your legs. I learnt this when I woke up with what felt like a big water bladder on my quilt. Everything was dry though. Next night I added an extra guy to the rear, pitched like in this picture using a stick:
The Protrail back end looks very different to the Contrail though.
Bathtub floor is great atmo. I don't use a groundsheet, but I did with my Hubba Hubba. I'd say the Tarptent is tougher.
The Tarptent Contrail needs some support down its spine to keep water from pooling over your legs. I learnt this when I woke up with what felt like a big water bladder on my quilt. Everything was dry though. Next night I added an extra guy to the rear, pitched like in this picture using a stick:
The Protrail back end looks very different to the Contrail though.