I got this as a gift from my parents a couple years ago and was very weary about using it since it was so cheap(money-wise). I'm really happy with that it turned out better than expected! I've backpacked multiple times with it and all my friends were impressed with its size, shape, weight, and were taken back that it was from kmart. I've had 4 adults sleep in it before. It was a really close squeeze, but doable for an emergency. It stays rather warm. It doesn't come with a ground cloth, so I use an cheap one I bought separately. During a big storm I did have some trouble; water soaked through the walls and started puddling on the bottom. I didn't mind it that much since I was hiking out that day, but shortly after I sprayed it with waterproofing spray. I'm going to test if it's actually 4 seasons this winter! I personally think it's a great investment for only $40, especially if you're poor like the college student I am!
I haven't had a chance to use, but, looking forward to it. The handles came torn and that was disappointing. No way it wasn't noticed before shipping, yet they chose to send it off to a paying customer anyway.
Enough room for to tall people to have leg room and not touch the sides. The zippers seam to be make very good.