Most reviews I see for Teriyaki Park are full of disclaimers and excuses about Waco being too small to support 'good sushi'. So lets really be honest - mediocre food is mediocre regardless where it gets served. Teriyaki Park serves average quality sushi. It isn't terrible, but it isn't really great either. The people are nice, so that's a plus. The real deal breaker is how dirty the place is. The last 2 times I've eaten there have been terrible. Dead roaches on the floor (at least they are dead right?), rotten food stuck in the cracks and underneath the tables (don't spill your drink unless you want to be covered with spoiled food runoff).
I am a big supporter of local business, and I want to like Teriyaki Park, but it isn't healthy to exempt a restaurant from cleanliness standards just because its local.