I love my UM Mest OG. The sound stage and imaging are the features I like the most and what gives them ear time in my IEM portfolio. I like what I am reading about the MKII, but I am not likely to upgrade even with the stated improvements because I like what I have.@UniqueMelody soundstage and holographic sensation is same as MK1?
For the record, even though I only recently purchased the UM Mest, it doesn't really bother me that UM is introducing a new and improved version. It's just a new IEM and more IEMs in the market give us more choices. The only thing I don't like is the effect it will have on the resale value of the UM Mest OG.