Caldwell is not the best. But, it works.
On Sunday. I won a BR match. With the Caldwell.
In July. I had 2 seconds and a 3rd place match. Won some money.
I agree with Zippy except that I'd clarify this comment to say that the Caldwell Rock BR Competition rest with its cast iron base works quite well within reasonable expectations.
For me, as the owner/user of a top end deluxe one piece rest for match shooting, I also have a couple of the Caldwell Rock rests, one with a Fudd true windage top, the other with the standard Caldwell windage front gun guide outfitted with Protektor bags and find its flexibility and ease of transporting very adequate for load development, field shooting, and testing/sighting new guns rather than lugging around and beating up a precision heavy one piece rest which gets reserved for competition match shooting.
My advice is to stay away from the lighter lower priced Caldwell models, my comments only pertain to the Caldwell Rock BR competition model. And yes, Caldwell rests are a bit sloppier in fit and finish than most other makers rests however for a lower priced entry level shooting rest, the Caldwell gets the job done admirably for what you pay as compared to other more expensive makes. One simply learns not to back the column lock off all the way, leave a little bit of drag when changing elevation and the Caldwell rest works quite well.
Also, be aware, Caldwell's use of the term windage adjustment for their Rock BR top is not in line with what benchrest shooter's consider a windage top. Caldwell's windage adjust only works for slight adjustments on a single bullseye, not for traversing a IR5050 style match target, for that you end up using the bag squeezing technique.
Speaking of bags, I'd strongly recommend either Dave Dorhmann's front bags or "Protektor" bags with a Caldwell rest instead of using the Caldwell bags. My experience with the Caldwell bags is that they tend to leak fine grit all the time. Dave Dorhmann sells the "Protektor" leather front bags with a synthetic material added to the gun guiding surfaces that is far superior to the bare leather bag alone and his prices are very reasonable...
Frankly, for what a Caldwell Rock BR Competition rest costs, I think they are a good solid rest for an entry level rest without having to spend an arm and leg...
Happy shooting,
Mitch & Shadow...