I went to Knott's last week for the first time in about 35 years (last time was when I was 5 of 6 years old).
It's a decent park. It's clearly not on the same tier as a Disney or Universal park (yet the pricing of $60/person with parking and all day drinks included was nice). The Calico / Ghost Town areas reminded me a lot of Silver Dollar City. Ghostrider might be my new favorite roller coaster. My kids loved the Timber Mountain Log Ride (and I can see where the inspiration for Splash / Tiana's came from). Sierra Sidewinder was a fun "kiddie" coaster. I loved the Calico Mine Ride.
Some other notes:
Berry Tales seemed like a rip off of TSMM but nowhere near as good.
I'd heard great things about Calico River Rapids but it seemed to be missing something. Jaguar, which my kids loved, also seemed to be missing something.
Xelerator and Pony Express are fun, short coasters. Pony Express reminded me of a "mini" version of Tron.
Silver Bullet is a great coaster but, as others have said, seems very out of place with its location in the park.
Knotts did a terrible job of queue management. Rides were constantly running with open seats.
The Mrs. Knott's Chicken Dinner restaurant is a hidden gem and the food seemed really good for the price.
All in all, I'd definitely go there again and it is a great little park.