For me, it's all about the beautiful back patio. That said, Allen's has some excellent food.
I've experienced some snooty attitude from the Maitre D'. But overall, I like the joint.
A few food highlights: Flavourful, freshly spiced curries, lovely grilled sweet potatoes with lime sauce, and the Blacked Potato Salad is rich and scrummy. Good burgers, great grilled meat if that's your thing. They have a lovely beef stew with potatoes.
I've had the grilled salmon with potatoes and spinach and mustard sauce and found it bland and uninspired.