We always end up at Penn's Thai House when we want Thai. We usually come with the whole family for dinner and take up the entire middle table. Everyone leaves full and the prices are reasonable. We've always experienced consistent food and service.
Aside from the fish tank, the decor is plain, but everyone feels comfortable here because the staff of the family owned restaurant always recognize us and they make sure we have a nice experience. We regularly order Tom Yum Shrimp, Papaya Salad, Beef Salad, Chicken Larb, sticky rice, and any of their curries. We tend to favor the yellow curry with chicken. The papaya salad easily rivals my sister in law's home made. We rarely ever leave with take out boxes and frequently have to order more.
On this most recent visit, I came in with my wife for their lunch specials ($6.95). I had the green curry with pork and she had the yellow curry with chicken. Lunch specials come with a small salad and an egg roll. Spice level is mild, medium, or hot. I ordered hot and it had me working up a nice sweat but it wasn't too much and I was able to finish the dish off. I also ordered a Thai tea which was gone before my food came out.
Service has always been consistent for us but they usually only have one person serving the entire restaurant and occasionally she can get overwhelmed.