I spent two nights at the Hollies in early August. The staff were friendly and welcoming. The food (dinner and full English breakfast) were excellent (although no food is served on Tuesday evening, but there are nearby options available). London Pride on draft.
The pub itself does not open until 5, but you can check in after 3 PM. Room 4 was very spacious with a surprisingly large bathroom.
The pub is just over a mile from central Westbury, and Warminster is close by. It is less than an hour's drive to get further afield to Cheddar, Wells and Glastonbury.
A huge shout out and thanks to "Charlie", one of the managers, who noticed I had a flat tyre and changed the spare for me. "Thank you"!