The best dog I ever had was a "Dachsy" named Anna.
S.Brown was right they have tremendous personality , they are little dogs with huge hearts , willing to take on adversaries many times thier size.
A little Dachshund history , they were originally bred for hunting badgers , the German word for badger is Dachel or Teckel , hence the name Dachshund , or Teckhund as some folks call them, if you know some about animals you know that badgers are one of the meanest , most 'standoffish' animals on this rock , so imagine the dog bred to hunt them.
They are smart , mischevious and stubborn as mules but that is what makes them such a special dog.
Yea they can have problems like hips and spine but so can many dogs costing thousands of dollars like purebred Labs , English Bulldogs , German Shepherds and so forth. I would not let that stand in the way of getting an excellent companion , anyone that says Dachsy's are "foo-foo dogs" because of thier diminutive size does not know dogs.
My friend Tim had one named Bruno ( I got my Dachshund pup from his sister ) , this dog was one mean sucker if he did not know you , there are some funny stories of Bruno that still make me chuckle to this day.
If there is one drawback to them , two people I have known that have had Dachshunds did not raise them right , they turned into cowering little guys that would pee if you tried to pick them up , they were skittish which is unusual for Dachshunds , so do not holler at them or smack them when they are pups , you will scar thier little brain.
I would suggest looking at some sites pertaining to Dachshunds and how to deal effectivly with thier temper and personality , if you do it right you will have one of the most loyal and loving of friends you could ask for.