D250pro vs D1000pro on B&W 802 D3

[zaienk]

I received my d-premier upgraded in 250 pro on monday.
Sadly it came back with some scratch   and a impact or bubble on the screen under the glass   
I reported it to devialet immediatly with pictures and now I have to call them everyday to get an update as they don't provide any  
I didn't see that at first when I unpacked the devialet as the amplifier was very very cold (the plan trip I guess) so after unpacking, it start to condense until it get warmer.

I took some time to listen both 250 pro. I didn't notice perceptible change in sound quality even if the first D250pro is white and the other one is chrome.

Create a D1000 configuration throught the website and understand how to connect the whole thing were easy. I use a VOVOX link protect AD coaxial cable to link both 250 pro since devialet refused to provide their standard cable with the upgrade.

So I start a quick listenning session without expecting that much improvement and with fear to hear a little delay between the 2 channels.

Hopefully fear and scepticism disapeared quicky. It sound sweet, really sweet... like I can hear much more of this class A sound. both channels merge perfectly, image feel bigger, sound much more immersive and realistic. Some people told me that dual mono can be addictive, I understand now why they said this. These amplifiers must have been engineered to work better in dual mono, that's my thought.
When my girlfriend came back at home, without knowing I made a upgrade, and after spending some time in the kitchen just close to the living room, she said : wow, music is like a caress to the ears   
 

Thanks for your comments Zaienk!  That was good to read! I currently have 250 Pro only, but now I really need to try it with second one. I hope You can solve scratches and screen bubbles soon with Devialet.

You're welcome.
Thing's are getting sad with Devialet. They called me back today saying that scratchs and the issue on the screen were already there by showing as a proof a document (which look like a draft) that describe messy scratchs and a bubble on the screen. The fact is that 98% of the scratchs described on this document doesn't exist. It looks like a kid played with a pen trying to draw something.
How would it be even possible to get a bubble on the screen behind the window other than doing something wrong during the building/upgrade process?
Hopefully I took a picture of the devialet just before closing the package and sending it to them. This picture shows that the amp was in good condition and with no "bubble" on the screen. 
Sadly I think i'm now engaged in a long process to make them admit that a fault has been comitted during the upgrade process and make them fix it up but I will not give up. 
My advise : take carefully some detailled picture of your amp before sending it to them...