I switched for several reasons actually....
Switched from the MPA Lite due to the short forearm. The longer forearm of the ESS will make it easier to hold a better group with the longer support.
No provisions for NV. Yes, their COMP model has it, but I was already into the Lite chassis before need for NV came up.
MUCH better magazine release design. The ESS is super easy to get your finger on the release, especially when talking about the longer release characteristics of the Savage.
Thumb SHELF vs. the notch. The notch was ok, but the thumb shelf is awesome!!
The ESS is more adjustable, in the fact I can get my eye directly behind the eyepiece with the offset cheek rest. WAY better!!
Aesthetics. I really like the looks of the ESS over any other chassis anywhere else out there, including the Cadex Defense.
Great price point for what all you get!!
DK