Ive used Sun System 10 ballasts for years without any issues whatsoever. I also have a used hydrofarm that must be 10+ years old, no problems with it either. So what I am getting at is that there are not many companies who manufacture the interenal ballast components so they are largely the same. Some newer ones have easy access doors to replace the capacitor, but that really doesnt seem neccessary. Just buy a new one with a warranty and youll be fine with any brand.