The advantages to Dachshunds are that they are good hunting dogs. They can fit in small spaces to chase small animals, like rabbits and badgers. Dachshunds are better than species that are not selectively bred because they can fit in small spaces, unlike larger hunting dogs.
The disadvantages to Dachshunds are that they have long bodies, which makes them prone to hurting their backs. They are also short, so they have trouble jumping over tall things.
See Dachshunds chasing animals in the video below: