Okay, here's the report:
They do pretty much what they claim. With one glaring exception. No way do they increase top speed. I took a 4 mph hit top end. And I ain't havin none'a that!
One thing they do extremely well is keep the boat tracking straight @ idle. You notice that difference immediately.
Better handling/stability overall but you can still induce porpoising. Chine walk is reduced, but not eliminated.
Have to trim all the way in to get outa the hole. And the bow plows at first. Then when ya pick up a few mph the tabs relax and let the bow come up some.
Cornering didn't seem to be affected. Did some purty tight turns and I couldn't notice a difference.
These are the SX model with the middle of the road "shocks". Might cause less drag with the wimpier shocks, but then I bet some of your symptoms would return?
I can see where these things could help other boats with at least a couple problems. But on our boats boy I dunno. Might try to get my hands on some of the lighter duty shocks but for now I'm gonna take the tabs off.