We have been here quite a few times and have always had a good experience.
The donairs (and the donair pizza and nachos) are absolutely delicious and the portion sizes are very large. Price-wise you get a lot of value for your money.
The service is what really shines at Blowers and Grafton. All of the waitresses that we've had have been friendly and do their jobs well. At our last visit, a new kitchen staff was being trained and our food was really delayed. Our server handled the situation really well and did everything she could to make the visit as enjoyable as possible considering the circumstances.
Definitely worth a visit!