Best features of the Trail Ridge: excellent ventilation; great headroom; reliable waterproofing; reasonable price.
The 2P and 3P are among the tallest and most spacious 2 and 3-person tents on the market. They are very easy to enter despite their small size. You can actually step into the 3P. The 4P has one problem that bugs me: the solid fabric door. There is no view outside and it really cuts down on the ventilation in the summer. I'm planning on replacing the door with mesh.
While the 2P and 3P are larger than average, the 4P is possibly smaller than average. For me that was an advantage in buying it, but it's really best suited to two adults, or two adults and one child.
I honestly can't think of a good reason to pay more for a brand like Big Agnes, MSR, and so on. The Kelty Trail Ridge costs half the price of some other brands yet has better features and the fabric and poles are just as reliable.