I have been to The Flying Hound twice. Both times we were seated right away. The food is very good. The first time I had a burger and the second time I had fish and chips. The decor is pleasant and I imagine the patio will be a great spot to have a beer once it warms up some.
The only downside that I can see is the service. The food was slow to come out both times I was there. The first visit we had a very nice waitress the second time our server was not very friendly.
I have really high hopes for this place. Maybe over time the service kinks will be worked through. It is a nice addition to the Fitchburg restaurant scene.