This is the standard of modern engine monitoring. I have installed 3 of these for different customers and have heard no complaints. In my opinion this is the minimum (and really the only) gage you need to consider when shopping for engine analyzer and or fuel computer. Sure, EI claims to have better quality, but with a bigger screen, the bang for the buck on this one is in surpassed. Do yourself a favor and Dont Buy Used Junk on EBay!!! You will spend many times more money troubleshooting it, than a brand new unit with warranty.

Heres my assessment of this unit after having it installed during overhaul of my engine. 1) Be aware that the engineering advancement effort on this product was clearly focused on the screen compared to the 700/800 series. Improvements are limited to those that could be relatively passive in an upgrade from those earlier models. For example, real estate around the screen is such that a separate toggle switch for All, Fuel and EGT/CHT is really not needed. It should have been baked into the unit. On the 800/700 it was understandable as real estate on the unit was limited. 2) The documentation is rather shameful. It shipped with a 5 year old manual that is multiple versions behind the software onboard. When I asked if I had the current manual, Support replied that it was the current document. This part of the response was a bit amusing: EDM updates occur faster than manual updates. Clearly, by about 5 years. Youll find menu options not in the manual, reworded or out of order from the book that makes it confusing to program. For example, I asked what KFactor2 was as it was not in the manual or the FAQ on the website. I was told it was for pressurized carbs and to ignore it. Great, but I asked if the manual or FAQ could be updated. The response was he did not know when the doc would be updated. So much for trying to save the next pilot a little trouble. During my inquiry I also recd a document with an attempt at outlining the current menu options. The document was scribbled on, had grammar issues and wasnt something I would allow, as a director of support at my own company, to go out the door. 3) Email support was rather poor. A lot of one line answers that were incomplete. For example, I asked how Fuel Flow impacted %HP calc as that was the only thing I had not finalized. The response led me to believe this person doesnt know: Fuel flow does play a part in %hp uncertain as to how much it would be off but should be relatively close. I offered an enhancement request for a future software version and it was glossed over and not responded to. Overall, I will say I do like the unit. The display is very nice and the information will be helpful in my operation of the aircraft. Just expect documentation and email support to be lacking/no frills and for the product itself to be optimized for a better display and upgrading older units.