Even if the stealths do electrocute you that doesnt mean it will hurt your livestock, the only way for it to shock them is if it is somehow touching the ground and glass is not conductive.
Ive had 2 stealth heaters shock me and 4 of them fail, though those were probably just from old age. I've had an original ebo-jager since before I even started this hobby, my aunt gave it to me after running a few years in her tank and she probably got it from the guy who sold her the tank. Now I am running two 250w ehiem jager heaters and my original 250w ebo jager, I've only had them for a little while but theve worked well for me so far, but I had stealths fail earlier than that.
Ok so maybe eheim jagers arent as good as ebo jagers, but they are way better than stealths.