I also have a Caldwell Stable Table. I’ve had it about 7 years and it’s been used a lot - as in pretty much weekly for most of that time.
The only issue I had was the plastic heads on the thumbscrews slipping on the screws themselves, and it’s an odd metric thread. They sent me a pair of replacements and they’ve held up well in the 5 or 6 years since.
The table top isn’t huge and it was initially a bucket list item to make a larger one out of 1 1/4” finger jointed panel wood, but once I figured out how to use it efficiently that need went away. Using a tripod for the spotting scope also frees up a lot of space.
It is heavy, so portable is a relative term. Until recently I kept it and most of my other range gear in a small clamshell trailer on our property. We have however recently sold that property so it’s now along side the house. Carrying the pieces 20-30 ft and setting them up wasn’t a big deal. But it’s not something you’ll want to pack a 1/4 mile.