this place is the definition of mom and pop store. It's a very small store and they serve good quality food. It's very home-y style (I've seen regulars refill their tea themselves with hot water - not out of frustration with the slow service, but because they are comfortable). It should be noted that they use good quality tea and regular refill the pot so you're not just drinking tea flavoured water. Also of note is the miso soup. It won't make you feel like you are going to OD on sodium, and actually tastes like something.
Their crispy rolls were also actually crispy. A lot of places serve you rolls that have been sitting around and the filling is only marginally crunchy. The tempura bits they use here are super fresh.
As other reviews have noted, the service can be slow because the place is literally run by 2 people (including the chef - they are husband and wife) but they serve good quality food and this is as low scale/neighbourhood friendly as it gets. It has also been around for a long time, so that is always a good sign.