I have no experience with that heater but use Inkbirds in all 4 of my tanks so would always use it. For additional redundancy I have 2 heaters in every tank. By setting the heaters slightly higher than the inkbird I have all of the following protections (and limitations):
- A heater stops heating -> I have another and no harm done
- Heater thermostat fails (low) and heater doesn't come on -> Same as #1
- Heater thermostat fails (high) and heater doesn't turn off -> Inkbird turns it off (but I won't know it has failed)
- Inkbird probe fails (high) and doesn't turn it off -> Heaters turn themselves off
- Inkbird probe fails (low) -> I have to check the thermometer, in theory Inkbird will notify me but I don't rely on that
- Inkbird fails altogether -> Same as #5
One thing to be aware of is that Inkbirds are not infallible. I have had to replace 4 or 5 probes in the 8 years I have been using them and one unit failed altogether. The new ones with dual probes are supposed to offer some protection against this (you get an alert if the probes show different readings), but mine are all older with a single probe.
And an observation. 3 of my Inkbirds are non-wifi and have been absolutely bullet proof. The wifi one occasionally gives a false alarm. As a safety feature when it is in an alarm state it turns the heaters off and the only way to clear the error is to turn off the power and turn it back on. A distributor told me that they are prone to doing that. It happened once every 2-4 weeks initially. Then it happened mid winter when I was away from home for 3 weeks and I spent a few anxious days watching the temp drop on my phone and desperately trying to reset the via phone. When my neighbour got home (it was over Christmas) he went in and flicked the power switch and everything survived the holiday. After that I connected it to a smart plug and every 6 hours I turn it off for 5 minutes. That way if it does enter a false alarm state the max it will be without heat is 6 hours. I have never had a problem since and also not seen a false alarm.
I do tend to rely on the Inkbird but it is good practice to check periodically with a thermometer that the Inkbird is reporting the correct temp - I usually do this weekly at water change time. Except in the height of summer (when the heaters are off anyway) I normally add water slightly cooler than the Inkbird settings. This allows me to check that all the heaters come on. Any that don't get replaced.