I'll second what Franco says; we need to know more about where and when you're using this tent. In my own case, I love the design of the Shires TarpTents, but I continue to prefer my MSR Hubba. Why? Because it's hot and humid and doesn't cool down at night where I hike and, although the Rainbow is well-ventilated, it still can't match the amount of mesh in the Hubba. As a result, it will heat up in August more than the Hubba will - so the extra pound and a half or two pounds (I forget which) of additional weight is worth the comfort. Were I hiking somewhere less humid, where there was a large temperature drop at night, I'd switch to the Tarptent in a minute.

That's just one example of the way where and when can affect your choice of tents. Let us know, and we'll try to help.