I have no problem with their food - I usually get the yakisoba or one of the tonkotsu ramen, plus an onigiri - but their customer service is an issue. They're slow to take orders and not good at bringing water, napkins, etc.
Here's an egregious example from my most recent visit. I ordered the yakisoba and an onigiri. They brought out the yakisoba, then a couple minutes later gave the onigiri to the guy beside me. (We were 2 of about 8-10 people in the restaurant and were seated right next to each other). I saw it there and saw him poke it a couple times before they came back to him and asked if he had ordered it. He said no. They asked if they could charge him for it. (!!!!!!!) He said yes. A few minutes later, they brought me an onigiri.
Their reaction during all of this was to tell me nothing. They literally never said anything, just brought me an onigiri that was like 10 minutes delayed because of their mess-up. It was kind of gross. No adjustments to my bill, obviously.
This is just one example. I still remember going here with a family member right as they were getting off of lunch break - which they eat at a table by the cash, without closing the door or putting up a sign or anything - and being told that we MIGHT have to leave or wait until they finished. We didn't, but it was ridiculous.