Is Buick a good car to purchase?

I think they are considered on same level (reliability) as Chevrolet, good but not as good as some imports. If you buy one should have same warranty as Chevy 100k miles. Research and get one that still falls under factory warranty, don't buy an aftermarket warranty and get a 6 cyl if you can. That way won't feel underpowered and should have little more longevity for engine. They tend to be seen as an old person's brand, but if you want to buy American and that doesn't bother you I would consider one.