We had one with our first TT, came with it, we put it up once in front of the house. It fit well and looked like it was well built, had extra material to weight it down or steak it, even had a short piece that snapped on and covered the gap under the camper. It took us about 15-20min to get it out and set it up. We live in California and have no bugs so we never used it here and when we were in other states we never stayed long enough in one spot to need it. Carried it around for 4-5 years under the bed. Maybe if we lived in UP(upper peninsula of Michigan) use to have a fishing cabin on lake Gogebic with deer flies, black flies, horse flies and mosquitoes, I think we might have used it.
If you stay in one spot long enough to make it worth setting up and down, and if there is a need for it (bugs,) ya there great.
We also had a manual awning which made it easy to attach while it was tilted down.
2011 Wildwood T26BHXL
2004 Yukon XL Denali
43yrs of camping; one lucky guy