Ok, so the place could be cleaner, better ventilated and well-lit, ok. We get it.
Granted, this place is not for the faint of heart, but if you're in it for best value for money, as I am, then this could very well be your new favourite Kyoto restaurant.
I had dinner there not once, but twice and was certainly not turned away, as others have suggested (Ok so maybe they were in such shock a 'gaijin' would even venture on inside they had no time to react, but that's beside the point).
On to the good stuff; the food. They have a Chinese/Japanese menu so you'll need some understanding of written Japanese or enlist the help of an interpreter (sold separately). If in doubt, just ask for the "gyouza setto" and a "nama biiru" and you'll be good to go.
The gyouza setto featured 12 delicious Gyoza, a bowl of white rice, a small soup, 5-6 pieces of 'karaage' (fried chicken) and a small salad, all for an unbeatable price of just ¥750. The beer'll set you back about ¥550 for either a chilled jug or a large 600ml or so bottle.