For what it is, it is great. Mind you, it's a little out of the way, but if you have a car you'll have no problem getting there.
I have only been here in the mornings (their opening hours are alright but I definitely recommend coming here in the mornings as it is quieter), but the staff have always been cheery and helpful enough.
Personally, it's probably the feeling of receiving mail which makes this place great. Especially when it is an unexpected parcel that you didn't know you were getting (a friend of mine once sent me something because she's amazing and she thinks I'm amazing too, based on her parcel anyways, or little tokens of appreciation of far away loved ones that decided to surprise you with a little something to keep you warm from Jack Wills). read more