Having never bought a Groupon voucher to use at a restaurant it would be interesting to know peoples experiences. Is the food that you get generally small in size and inferior to if you were to rock up at the place as you would do normally?
Only used it once for a tasting menu for the Dining Room in Reigate (nice restaurant but not Michelin starred or anything). Food and service were great and as far as I was concerned it was no different to when I've been there and paid standard rate.