Well, I used them this past Friday as front of the house audience fills. I positioned them blumlein at the very front of the stage. At the stage position vocals always are thin due to missing the PA but stage instruments, as well as, audience and reverb from the rear is ideal. I have run a Nuemann SM69 fet from this position. I have also run split omni's, ADK A51TL and schoeps CCM4's from the the lip. Therefore, I have a very good idea of what other mics sound like as foh fills. Only in situations where the performance is instrumental do two tracks from this position stand well on there own, but this is not what I use the foh fills for. They are used to add "hall" sound and create a live multi-track recording.
That being said, I can report that they did an excellent job. As I had hoped, the longer ribbon extended both the high and low ends. The tracks sound very natural throughout the entire frequency response, with the high end being very real and refined. One item of note is that they do require extra gain, so one should have a preamp that has decent gain to get the best from the mics. Over the next few months I will use them for a variety of applications, e.g., cabs, horns, piano, etc. and will provide updated as I move forward.
One thing of serious note is that these mics are large and heavy and, therefore, can take up some space. However, in a blumlein position they are not too bad. They are also need a beefy stand. They need to be run indoors and in conditions that are not rowdy. These are ribbons and are a bit more senstive than condensers. But, for $175 each with the stock transformer, or an extra $75 for your choice of aftermarket trannsformer, they are an absolute steal. For a small cost they are well worth adding to your mic collection and pulling out when the conditions are right.