Last week I started experimenting with the MIGS. I put a set underneath my DAC prototype which had just been sitting on my Esoteric clock. I really wasn't expecting much, if any difference. I was wrong - On ambient, they were awful.
In the "pinpoint" configuration, they got a lot better, now slightly exceeding the performance of the DAC directly on top of the clock. My system is back to life, plus a bit better imaging. The clock is sitting directly on my Esoteric Transport, which in turn is sitting upon 3 Cerapucs. I will probably do some more experimentation putting MIGs under the clock, but only after I figure out what to do with the preamp below.
Yesterday, I put a another set under my VAC preamp, also in the pin-point position. These are replacing FI Cerapucs that were under the preamp. So far, the MIGs seem a bit brighter, with a bit better bass and also a bit better imaging, but I will have to give these several more days of comparison to determine which I prefer under the preamp.
I will also be getting a set of Speaker-cells to demo in a few weeks. I'm being very careful to add things slowly, in order to clearly identify which addition/replacement is responsible for the subtle (or not so subtle) changes to my system.
Just my $.02. Hope this helps.