I am in my fourth greenhouse, the first one huge and professionally built (hurricane Katrina eliminated that one), and the last three came as kits. Each one has been better quality/better esthetics than the one before it. By the fourth one, I knew what to look for and what to lookout for. Each one was of a different manufacturer. All were 10x12'. The last one was a DuraMax, sold through Greenhouse Nation. I actually looked at a Harbor Freight GH before I purchased the DuraMax.
I don't like to be negative about any product I have not owned, but from what I saw and the feedback I got convinced me this was not a GH I wanted to own. I am quite handy and could certainly do all the "improvements" to make the HF greenhouse more durable, but I chose to build a GH with strength already there. I did pay more for the DuraMax than I could have bought the Harbor Freight GH for, but after doing all the necessary modifications, the cost would have basically been similar.
I like the GH that is being sold at Home Depot, at least the picture looks similar to what my DuraMax looks like. I would prefer a 10x12' over an 8x12' since I have extensive shelving on both sides of my greenhouses. The added head-room is nice. My DuraMax is only 7' tall. That being said, since I cannot actually see how the Home Depot GH is put together or what the quality of the materials is, I can't say "yes" or "no" to this structure.
One thing that is very important, regardless of the brand of GH. Be sure to do everything necessary to get the foundation both level and square.