So far, I have only used my Vector 22 once. However, on the one overnighter I used it, it rained hard most of the night, starting at 7pm and ending about 5am. During many times, the rain was a torrential downpour, complete with lots of lightning and thunder. I didn't sleep well because of the intensity of the weather (and sounds of large tree limbs crashing down), but the tent stayed pretty dry.
I use the term "pretty dry" because the rain fly did drip a few times, but it only dripped (very slowly) during the most intense part of the rain storm. When the rain was not intense, the fly did not seem water at all. Maybe some additional seam sealer will fix that.
Please note that a few other campers got absolutely soaked during this trip, some due to ground-level water flows. The ground water did not affect my tent (with the footprint). Thank goodness!
Room for two is a little cramped, but not too bad. I would not recommend this tent for use by two large-sized people or with wide sleeping bags. For a couple, it would be pretty nice, though!
The positives: The bottom of the tent remained dry throughout the very rainy night. This tent is pretty light, especially for the price. It was very easy to set up. It cleaned up very easily (red clay and other mud in abundance). Quality appears to be excellent. Glow-in-the-dark zippers are cool. It is versatile in that you can use the fly with the footprint for real ultralight backpacking.
Important note: Buy the footprint, if you are buying any good quality tent if you want it to last!!
Overall, this is a very good tent!