Gungnir sound before and after multi-bit upgrade?


Would appreciate reading owners' descriptions of what they heard before and after upgrading their Schiit DACs to multi-bit.  What were the sonic benefits?  Mostly interested in effects on the Gungnir but would be interested in comments about Modi, BiFrost or Yggdrasil as well.  

Searched here on A'gon but did not come across anything that clearly addressed before and after sound.  

If this has been discussed and I missed it, my apologies but please link me to it.   

Thanks in advance.
128x128ghosthouse
@wtf 
Hey wtf, thanks for the follow up.  Glad to read your positive experience with the multi bit upgrade and favorable comparison to the Chord Qute.  I quickly checked price on that.  What HiFi had it at 990 British Pounds back in their Oct 2014 review...so that's some strong company for the Bifrost.  Thanks again.  
@ghosthouse

Yes, the Yggy was only released as MB.

Questions about money are always dependent on the value you place on things, and your economic situation. So I will not address absolute "worth".

Relative "worth" is easier. I think it would be as big or greater an improvement as going from singled-end to balanced cables (although this ignores the quality of each type of cable). It is said that the SE summing circuit on the Yggy is "super transparent" (see #2 on http://tweakaudio.com/EVS-2/Schiit_mod.html), and if it is the same on the Gungnir, this might be part of your preference for balanced ICs.
Can the MB upgrade be done by the owner of a Bifrost?
No, unless they've changed their policy since I had mine upgraded.
MB upgrade of Bifrost requires return of unit to Schiit, as they need to flash upgrade the software on the main board (EPROM?), I think ...