Love the wild side jar.  This Is a replacement jar for me. Enjoyed the other one for 3 years, grinding seeds, making raw juices, etc.  Wish it didn't have some ridges on the inside which makes it harder to get everything out with my spatula.  Also found the slightly bigger opening in the previous jar lid more convenient, but LOVE my Blendtec Blender.  Would love it more if it weren't so noisy, but then it probably wouldn't have the muscle I appreciate now.