There is not much to say about these microphones. If you have a decent sounding room, find the right position for the mics and have a good preamp, the sound is of the Lewitt LCT mics is fantastic. The sound is much more musical than many other mics in a similar price range. I've recorded a lot of acoustic instruments like guitar and piano and my go-to mics are a pair of Schoeps. But if you are working on a budget or don't want to spent an arm and a leg for your overheads/stereo-pair you can't go wrong with these.
I haven't really used the high-freq. enhancer or "Air" switch but I guess in some recording situation it can add a nice shimmer (close guitar mic comes to mind).
They don't feel as "sturdy" as other small diaphragm condensers but thats not a big issue if you use them in the studio or at home. I would definitely buy them again.