I was just thinking of starting this exact topic. Like the OP I've had some go bad here and there but never a big issue as they aslo were the abaze from PL. But I recently got an assortment of one from Cointaker and have to say the quality lately isn't great. I bought a CT full kit for BOP close to a year ago and they all still work fine, but I put misc CT in my FH recently and within 50 plays I've already have 2 or 3 go out.