Psvane 300-B Tubes ? ? ?


Does anyone out there have any experience with Psvane 300-B MKII or their WE300-B Replica tubes ?  

I found the best sound from initially the Sophia Princess mesh-plate 300-B's, then their Royal Princess 300-B's however I'm definitely NOT happy with their reliability, especially the Royal Princess !  
I had a mesh-plate from new have a glowing spot on the mesh-plate, and they told me it was from sitting on the shelf for over a year !  REALLY ! ? ! ?  And I had two Royal Princess tubes go out with less than 600-hours on them, unfortunately well-past 1-yr. warranty.  Left a bad taste...  I'm NOT going back...  
I've tried EH gold-grid 300-B's, Gold-Lion's, JJ's...  All sound somewhat different but the Sophias sounded the best, however in my experience, reliability is questionable...  Thanks...  John  
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Hi Jond,
No doubt that we all have our specific experiences and outcomes, exactly why I wrote IMHO. I’d rather have an excellently implemented Pentode push pull type tube amplifier than a mediocre DHT amplifier. If both of them are executed to a high level then I would lean toward the DHT option.

To be clear both of my push pull amplifiers were "really " good sounding. When I put the 300b SET amplifier into my system there was an undeniable improvement. To be truthful all 300b amplifiers aren’t created equally. Jond I don’t doubt that your el 34 triode wired amp sounds wonderful.

I can understand the frustration with tube failures. In addition to superb sound quality the other great attribute of the EML XLS has been exceptional durability and reliability, it’s a terrific tube.
Charles
Charles agreed all the way around and also don't sleep on DHT pushpull amps! Two of the best I've heard an integrated pp 2a3 amp from Cary, I loved it but the gf said it was too bright, and a pp 45 amp from Deja Vu. Both wonderful sounding and a great juxtaposition of tubes and topologies! And I am sure all of your amps pushpull and DHT were all great sounding you seem to have excellent ears.
Thanks Jond,
Frequent attendance in live jazz clubs over the years (and a piano in our home) has conditioned the ears to natural sound. At least this is what I’ve come to believe. 😊
Charles
Nice speaking of which caught The Gil Evans Project doing the 60th anniversary of Miles Ahead at the Jazz Standard in NYC over Memorial Day weekend a really great show. My first live jazz in sometime I'm embarrassed to say.
@liquidsound heard the Emission-Labs 300-B (not the XLS variant) and they sound good however not as good (in my opinion) as my Sophia Princess mesh-plates tubes. 

Sorry I'm not clear, are you referring to to the Emission-Labs 300b solid plates in your comparison and is it the pricier Royal Princess or the similar priced Sophia princess mesh you compared against eachother. I ask because I use the solid plates but I've been curious about the punched metal "mesh" of  Sophia mid priced 300b. Thanks