When it comes to very versatile working breeds with global applications that spans across different cultures, laws and terrain much of what we consider to be 'Good', 'Bad' or 'Ugly' really depends on your own personal perspective and requirement.
As we have seen from some of the posts - the 'driving' attribute is absolutely essential in many cultures and not required at all in others. Having a dog that will locate a line, follow it with absolute determination, catch up with the quarry once held up in some cover, then have the balls to move that game (in the case of a boar) and keep it on the move - with continuous voice throughout.....Is not really a requirement for many UK stalkers. However, it could be?
The 'tracking' attribute is what most in the UK purchase a teckel for and for this, I think it is fair to say, they are very good. On the continent, achieving the Schwhk/20 or similar is not seen as a 'big deal'. Here in the UK, there are not many dogs that have passed a 1000 metre trail, aged 20 hours. The process is often one of 'training' and many good handlers, especially in Germany will pass this exam with a dog before it reaches 18 months. In reality, in the UK, as we do not 'drive' our big game and do not shoot at moving targets, the vast majority of shot deer are very easy to find. Most of the deer photographed with a dog beside it were not particularly difficult to find but......the companionship of having a deer stalking buddy is very important to many stalkers and having the dog there for a bit on extra insurance, in case something goes wrong is the role of most dogs here in Britain. Those dogs still need regular testing at long, old trails - something not always practised.
Teckels 'can be' good earth dogs but they must be selected from the right lines and even then, they must be encouraged correctly, from a young age. Only one of ours naturally went to ground (at 8 months) but I must add, none were encouraged to do so - with the correct entering, it might have been a different story.
Teckels make great house dogs, fun pets, good house guards, don't take up much space and don't cost much to feed.