I yanked my Neotherm heater setup (it's for sale by the way) and replaced it with a 300 watt Yager.
https://www.bulkreefsupply.com/eheim-jager-trutemp-aquarium-heater.html
Be warned, it's really long (barely fit) and kind of ugly. I wish I had not lost confidence in the Neotherms as they look great, totally blend in (I run my heaters in the DT where my probes are), and seem to be more efficient (run less and keep a stable temp).
That being said, I'm not taking any chances.
I have an apex unit and BRS basically said there top choice for a setup was an apex running the Jager. Which is what I did.
I find the Jager is on a lot more and has slightly more variation (I don't think it heats as efficiently as the 300 watt master slave setup the Neotherm has), but they're reliable and proven.
As a bonus, they're cheap too at $35 lol.