These are good tarps for the money. They pretty much land right smack in between the heavier blue or green Walmart or Harbor Freight tarps, and the higher end and lighter Silnylon offerings, concerning weight, workmanship, etc.
An entire thread was dedicated to Gear Guide's last round of tarps. Many did not get what they wanted or at least expected, but most were happy with what they paid for what they got.
If that doesn't make sense, search the thread. Seems like demensions and waterproofing were issues, in conflict with the advertised specs. These may certainly have been resolved this time around.
Either way, most if not all felt they got a great deal on a starter or extra tarp, even those needing to seal a seam or two, seemed satisfied. This does seem to be a great price, and suppliers do seem to run out of them pretty quickly each season.