There are not many Indian\Pakistani restaurants in Toledo, but of the few, Tandoor is certainly the best. In my experience, it also holds up well against similar restaurants in NYC, Hiroshima, Tokyo, Rochester, and Ann Arbor in terms of tastiness. In the countless times I have dined here, I have never received anything that I would say was "bad" in terms of taste, and would especially recommend the coconut soup, korma dishes, tandoori chicken, and mattar paneer. Oh, their tea is delicious too.
The only problem I've had with the Tandoor over the years is the service. This has changed, however, quite dramatically and for the better in the last few years as a pair of girls have generally taken over the vast majority of serving. They are very nice and friendly, so if you have not been back to the Tandoor because of how you were treated, you might want to try again. :)
As someone else noted, they will generally not take your check up and no, I'm not sure why either... maybe it's related to the NYC practice of making customers ask for the check in the first place?
Decor... it's fine. The place is small, though they use mirrors to make it feel a bit larger, but overall the dark furniture and all give it a homey feel. Despite the small size, the place can accomodate large groups, and frequently does.
As for the lunch buffet- it's extremely limited, with only a few dishes available. These though are generally very good, and of course there's all-you-can-eat naan.
Overall, though, Tandoor is one of my favorite places for dinner, and one of my favorite Indian\Pakistani restaurants...world-round.