Només has been around for quite awhile now. Their speciality is the $1 oysters on Tuesday and Wednesday. I remember how packed it used to be and unless you've got a reservation in the evening, you're not going to get in!
All things aside, I think this place serves average izakaya food. I honestly do not recommend eating the oysters or beef tartare here as I tried more than a handful of time (fourth time being a benefit of the doubt) and having a terrible stomach ache each time. My go to choice would be the ebi mayo (deep fried battered shrimp with sweet chili mayo) and the bulgogi tacos and burger sliders. Don't get the sushi! The sushi is level 1. If you go here for sushi... Don't even bother. Just walk across to sushi Moto. That place is a GEM.