I've switched a few of my tanks to Inline Heaters and I've had 1 out of 4 heaters fail. So far, those have been pretty nice heaters for the most part. I used to have Marineland Stealth back in the day and they were the best, but eventually, even they started to have QC problems and people started reporting melting and exploding heaters. I also have a Titanium Heater with a Temperature Controller on one of my tanks and I eventually had to replace the heater, but I feel that having a Temperature Controller definitely puts me more at ease.