I bought the NX1 and have used it for a week on the beach with no problems at all. One whole day was in a force 7 gale. There was a lot of noise but no damage to the tent. I have however beforehand, reinforced the two places where the top horizontal pole ends, with spinnaker tape, as I thought it a weak spot and also have seen a few reviews mentioning this.
I would suggest that this tent is perfect for the tropics but probably a cold tent. in the spring and autumn, for temperate climates and not for winter at all, because the outer tent, doesn't reach all the way to the ground and the inner tent has fly netting all the way from appr. 30 cm and up.
Its on sale at 250USD at Amazon