I actually own the Coleman Instant Tent 6, and took it out for the firt time this weekend.

We had a brief rain Saturday night, and it held up just fine under that rain-storm, but if they have a rain-fly for it now, I would probably still consider picking one up for really heavy downpours. The floor is very good, and no leaks. I did put set it up on a 10x10 tarp under it... just to protect it a little more.

The Tent is awesome, is as easy to set up as they claim and is very sturdy. Taking it down is a little harder as you have to get all the air out of it. At least the carry bag is big enough to hold the tent even if not rolled up as well as you would like it to be.