Honestly I can't believe how much better the cylinder wall lubrication has been with the dry sump on our race car! It's by far the best money you can spend if you're a road racer. In street trim it's a little over kill but it does solve many issues people have with blow by and oil consumption. It's basically recycling all your blow by oil and as you would imagine bearing lubrication is much better, ring seal, etc.
It's not going to fix busted cylinder liners..it's no miracle elixir but I'll get to that later.