Had a Hilleberg. Managed to get a full refund after one year of leaky camping. Check the internet and you will see many problems with the seams NOT being sealed etc etc.

Now using Exped Venus 2. It was half the price of the Hilleberg and is twice as good. It's heavier, but reliable in all weather.

Remember, a 4 season tent will give you at least 5 a degrees centigrade warmer interior than 3 season.