I had a Maggi Columbus on top of my BJ-70, and when I sold the 70 I let the tent go with it and am now shopping for one of the folding arb style tents.
Pros and cons of the columbus;
Pros; sets up in about a minute, seriously.
Hard shell took a lot of hits from branches with no problem, but if you leaned into a tree hard enough I'm sure you are gonna be learning fiberglass repair.
And that's about it for pros.
Cons; basically a one person tent. You are not gonna want to have your buddy in there with you! Your mistress maybe, but with clothes, bags, whatever else you drag into your tent for the night would be very cramped with two people.
Mattress is incredibly hard, I could not sleep more than 1/2 hour before having to turn over to the other side. Solved that with a large Thermo-rest air mattress on top of the torture rack masquerading as a mattress.
It does not look like a good wet weather tent. I never used it in the rain, but I think a lot of water would get in. Most of that water would prolly be under the mattress as opposed to dripping on you, but in a good storm I bet a lot of water would get in.
Entering and exiting in the rain, you are gonna get soaked climbing that ladder and you will be bringing that soaking with you into the small tent and transferring it to your bedding. Better bring a bag for your muddy shoes cuz they are gonna be on the mattress too. When the wife and I went on the Alaska cruiser trek I did not take the Columbus and used a large ground tent instead. It rained everyday and life would have been miserable in the Columbus. This is why the tepui autana is on my short list.
http://tepuitents.com/products/autana-tent
Wind noise, yep it makes a lot of noise on windy nights. I learned to bring earplugs.
As another posted, the bug screens are velcroed, and cumbersome to use.
My conclusion: Dry camping only for one person it's a great tent. Wet camping is probably not going to be a dry experience!