Kelty makes pretty solid (if non-sexy) tents. All the seams of the Trail Dome are factory taped, so barring the odd lemon, you can expect it to be rainproof. However, you should note that the tent only has a partial fly -- meaning no vestibule and also a chance of wind-blown horizontal rain making it through the mesh just above the door.
The price is fantastic, but fundamentally, this tent is a compromise: it uses perfectly functional materials that are heavier but cheaper -- and compensates with a partial fly. The end result is a cheaper tent that lacks a vestibule, but isn't overly heavy either.