AYON KT-SX Tube quality (failure rate?)

@ghosthouse
Indeed, I intend to replace the Ayon tubes with the Gold Lions after another few weeks. This will make for better statistics that might be skewed by "shipping" or "infant mortality", that should be ample time to experience either no or further tube failure.

After that time passes, I will run the Gold Lions for a few months to see if there is continued failure (I do not expect it — but I am wary, hence posting here.

@paladin 
Your take on Ayon strikes me as quite harsh. What experience do you have or know about? I am very curious as to what lies behind your statement.

Be warned "only played at CES". My friend bought one of their CD players "demo from review" when he got it the serial number was different from the reviews sn. Warning regarding bate and switch. 

Vic - what's the story on biasing for the Ayon?  Is it mainly auto but allows some manual tweaking or override?  Proper bias obviously critical to maximizing tube life.  Again, good luck.

@view cast
My only contact with Ayon was a few years ago when I was considering one of their CD players listed on the gon @ a very attractive price.
I called & spoke with someone there & was told that their unit would crush every other unit I was considering.
I am no novice & with over 50 years in audio - I think that I know a few things that some with less experience may not know.
After listening to 10 minutes of the most condescending BS & pitch on their product - I thanked the man & laughed for hours while ordering the other unit that I was considering.
I am not here to bash their products as I have never owned or will ever own anything they sell.
I only wish that they would treat a prospective buyer with more respect & not try to convince someone that there is nothing better than what they are selling.
As far as I am concerned - I can spend my money anywhere I want & cannot in good faith buy anything from someone who does not respect me - my wants, needs & budget.
Is it really possible that every item they sell is the best of show seven years running - power amps, pre; speakers & CD players?
I think not!
On this forum there is always talk about "hype" & after 10 minutes on the phone with Ayon - I knew I had met/spoken with the king!