I have talked directly with Victor Khomenko from BAT and he said that they had problems with the older original PIO Jensen Caps but the newer ones do not have the same problems. I had the caps replaced in my BAT VK-51se, all 12 and have had no problems in over 2 years. The original ones were not leaking but they were old. It took them about 150 hours to break in. I bought them directly from Jensen and saved a few hundred dollars.
Time will tell. But most in the know are going to be unwilling to roll the dice. They should have never leaked... Now they are better, and will not leak... What is one to believe? I will tell you this. The biggest reason industry moved away from PIOs is because they are very unreliable. I work on equipment with leaky Jensens almost monthly. Those customers would not take the new ones if they were free.
Further, I have always preferred dry paper. Which is technically not dry. It is wax impregnated.
BTW, aside from the leaking issue, and voltage leaky, they often short. That is why Jensen adds a poly film to their more expensive parts. Too expensive to fail.
