I recently visited Karni mata temple and my experience was very nice. Temple is very beautiful, peaceful environment.
As I enter inside the temple, I saw numerous rats inside the mandir. When we entered inside the gate, there were lots of vendors who force you to park your vehicle outside there shop, instead of that parking is available opposite of the shops, near the temple.
Opposite of karni mata temple there is karni mata museum where you can visit and see some photographs related to the life of karni mata.