I've been to W.G Grinder's multiple times and it's definitely hit or miss. Sometimes the sandwiches are really good and other times not. I've had good luck with the Pizza Grinder - though I don't always get the toppings that I request. The veggie grinder is sometimes good, but sometimes really dry (ask for extra dressing). I would like it better if the veggies were cooked before being put in the oven, which really only melts the cheese and toasts the bun.
I recommend their kettle chips and Greek Salad but would stay away from the potato salad, which usually has a brownish cast to it.
Also, their bathrooms are usually not very clean, which would make me want to get carry-out rather than eating in!