my plane came with Tanis and as far as i know its in working condition. when i installed JPI 830, they had to take out the probes and now it needs some kind of upgraded probe. my mechanic recommends Reiff since the cost of the upgrade probe from Tanis is pretty close to the whole Reiff system and he thinks Reiff does a better job of heating in this antarctic winter (KFAR) than Tanis. i realize this could be a Chevy vs Ford thing.. but any Reiff users out there who can tell me if they are happy with it? the way i am thinking is, the Reiff will get me a new system with their warranty and if i get Tanis upgraded probes, it will around the same money with no warranty on the actual system. however, i am wondering whats the actual difference between a $600 system (Reiff - TurboXP) vs a $850+ (Tanis). thoughts?