I've been to both locations, and I tend to frequent the Dublin location since it's closer to where I live. For whatever reason, every time I call the Dublin location to request a reservation at the last minute they act like they're doing me some huge favor in ""squeezing"" me in - only to arrive at a half empty restaurant. It does get busy, but I've NEVER had a problem getting a table, even the countless times I've shown up without a reservation. That aside, their selection of wine is pretty impressive and they provide very detailed descriptions of each wine so you know exactly what you're getting. They also have wine flights and wine & food flights. Their tapas selection is excellent and for the most part their tapas are really very good. I've ordered off the main menu two times and was disappointed both times. They seem to put their effort into the small plates. As far as their service, well, it can be pretty pokey to say the least (at least in Dublin), so be prepared to sit back and enjoy your wine!
Pros: Wine and tapas selection
Cons: Slow service