We enjoyed a very good breakfast and have been back since without a Groupon. However, our first visit was embarrassing, as we were told they no longer accept Groupon vouchers but would honour ours as we had bought our voucher before their cut-off date.
This weekend we attended the 'Bier Fest' in Cardiff, and had specifically booked booked for Friday night. Having driven five miles to get there, we found it was closed - "Due to unforeseen circumstances". (The given time table was from early evening - 6pm. until midnight). We were told we could come back the next day or, on Sunday but, that we would receive an email within the next hour. We could not make it on Saturday but, still awaiting that promised email, we drove a second five miles, 9Twenty miles in total, there and back), for what ? No food, and just a half pint of German beer, so we left with our voucher in hand and found somewhere else to eat.
Some of you offers are most disappointing whilst others are great - you need to get some consistency.