I've used the Megahorn, and concur with the posts on this forum.
Pro's
Excellent Budget friendly way to try / utilize a hot-tent
Has a removable top that allows for open fire inside the tent (I don't believe SO or Kifaru offer this)
Comes with all the hardware necessary
Is tall, two people can stand inside
Good internal tent options
Good hydrophic abilities
Cons
The return policy is unclear, the customer service is abysmal (I could never get a reply)
Made in China (not necessarily a con, but I prefer US made, leads to quality control)
Unclear long-term durability
If you are on a budget and know you won't return the item they are worth looking into (I obviously bought one). The Megahorn is unique in the open fire capabiility, the only other company I know of that does that is TentTipi (based in Norway I believe). I'm currently looking at a SO Redcliff or Kifaru Sawtooth to fill the 2-3 man backcountry tent requirement.