Will you use during snow season, or just for temp summer use?
I did some looking a while ago into this. I got the impression that they were not that bad. Not going to last ten continous years, but they won't just fold up under light snow.
If I did get one I would be tempted to frame it up a bit on the inside, 2x3's or the like, tieing to the metal bars, for more stength.
There are reviews on youtube, and how tos for setup.
As for HF vs Shelter Logic, I do not remember if there was much of a difference between them. I am sure the much more expensive ones are better, thicker material etc.