TOPIC: Lennox Pulse furnace

Any comments on a Lennox Pulse furnace?  After 16 years as an inspector and 11 years full-time, I inspected my first Lennox Pulse furnace today.  Unfortunately, there were a lot of personal items in the closet leading to the storage area in the basement where the unit was located and I had very little view of the furnace.  I am writing it up to be evaluated by an HVAC contractor since I could not see most of it.  But, just wanted to get opinions from others.  Please share you experience with them.  Thanks.

How old is the unit? I "recall" there were some issues with them in the late 80's early 90's...

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I talked with a contact that I have a Lennox.  I learned the Pulse systems need to be inspected every four years by a Lennox dealer using special tools the Lennox provides.