To be fair to the HBC, we visited here back in January 2013 (not long after it had opened), so service may well have improved since we visited. That said, we felt so let down by our initial visit this is precisely why we haven't bothered going back since.
Firstly, we were made to feel like an inconvenience by the staff who seemed very disinterested and secondly, the burgers weren't really anything special. The one veggie burger left in stock (they had sold out of all the others and the halloumi dish) was pretty bland. The meat burger was also reportedly pretty average and the chips were overcooked. Given the restaurant was virtually empty, our burgers took ages to come and we had to chase them up.
Given it's been open now for many months, it's probably only fair that we give it another chance. Watch this space...
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.