Just to add a 2p here....

I added a GISO on Friday. Has been well run in with 3-4 days of music. I spent 90 mins yesterday with 3 tracks switching GISO back and forth.

Really really hard to definitively say I can hear anything significant changing. Certainly nothing night and day going on. Nothing leaps out as different. It sounded awesome before and awesome after.

There is a hint of something that Jeremy noted earlier....."but with a slight concern that it doesn't appear quite as warm sounding as it did." I could talk myself in and out of this.

I'll do some more listening tests at the weekend. May recruit some local HH to help (you know who you are chaps).

Rgds,
Nick