I have one, she’s an absolutely wonderful little girl. She is so affectionate, incredibly gentle (rescues the very much alive and unharmed wood mice from that my cats bring into the house for me to play with 🙄 and brings them to me totally unharmed). The cats love her, one grooms her and snuggles with her, the other plays with her.
I was home with her for 3 months which gave me time to train her, we never have any toileting accidents now, it did take longer to train her than my previous dogs of a different breed but she was great from around 8 months.
Shes great with other dogs of all sizes, she went to doggy daycare once a week from five months to eight so was well socialised.
I have an elderly neighbour who adores her, so she goes to her now instead, my neighbour says it’s the highlight of her week and my dog gets so excited when I tell her where she’s going. She is an unofficial therapy dog.
She loves everyone and I’ve never spoken to so many people when out and about than I have since I got her. She’s always happy to be stroked and fussed although it takes twice as long to do anything. She really is tiny and because of this most people assume she’s a puppy.
I did lots of research both before deciding on the breed and before deciding on a breeder and it’s paid off along with training and so much love.
That said I have also encountered a few not quite so lovely ones but suspect that quite often their needs are not being met.
She doesn’t get a walk every day (usually an hour three times weekly as I’m disabled and struggle with mobility, however she prefers playing ball in the garden anyway so gets just as much exercise on non walk days. I also ensure she has snuffle mats and puzzle toys.
As so many have said up thread they were bred to work, if those needs are not channelled elsewhere you end up with a frustrated snappy dog. We attend a sausage meet up in a secure field and there are so many wonderful Dachshunds there, all very friendly to both dogs and humans alike.
Do your research, ensure you have the time to put in to training and lots of cuddling and get really good insurance in case of IVDD if you do decide to choose one.