Jeff,
We have an older, two-person MSR Bug Hut. Looks indentical to the REI 2-Person Bug Hut. I thought this MSR design was sold to Moss, but if it's REI branded, then I'm probably mistaken.
We mostly use it as an ancillary shelter at base camps, or for kayak trips to the Outerbanks in the summer. It's great for eating dinner, reading, or relaxing if the bugs are out in force. We also throw extra bags in there during the day if we don't want to leave stuff in the car at a trailhead. It would make a good, lightweight shelter for backpacking, but...
If you can find the fly for it, it certainly doesn't provide full coverage. It's more like a cap. (There's a single pole that gets tied in under tension perpendicular to the long direction. This gets layed over the top, secured with velcro loops at either end, then staked out on the four corners.)
I wouldn't trust this tent in any sort of high winds, although it is pretty flexible and can absorb a lot of torsion without breaking down. (Don't ask me how I know this.)
All in all, great for light conditions or as a second place to hang out, but if there's heavy rain or wind, I don't think it would provide any real protection.
Hope this helps,
Rob
