General:
* Comfortable: This is the most straightforward and versatile word.
* Cozy: Emphasizes warmth, snugness, and intimacy.
* Inviting: Suggests a welcoming atmosphere.
* Pleasant: Focuses on a generally agreeable feeling.
More specific:
* Snug: Emphasizes a feeling of being enclosed and protected.
* Homey: Conveys a feeling of being warm and welcoming like home.
* Relaxing: Focuses on the ability to unwind and de-stress.
* Secluded: Emphasizes privacy and quietness.
* Tranquil: Suggests a peaceful and calming atmosphere.
* Serene: Expresses a sense of peace and tranquility.
* Luxurious: Emphasizes comfort and extravagance.
The best word to use will depend on the specific context.