Okay, they do have a very narrow frequency response, they sound thin and dull at the same time, BUT:
this makes them very useful for sounds that need to take less space in the mix, I wouldn't use them for toms, but they make snare tops sound quite puffy (which is great for some styles), they are great as snare bottoms, they can be useful for electric guitar accents and take saturation well, so they can be used for effect vocals or drum room crush mics.
They actually feel great and they come with quite decent tom mounts that I now use for my Oktava MK-012 mics.
Also, because of their lack of bottom end, they don't have a strong proximity effect, so you can place them QUITE close to the sound source without having to EQ out several db of 150-300Hz.
After hearing them on toms I was going to sell them off, but after experimenting with them I think they are indeed useful for certain tasks and they are definitely worth the money. I'm keeping them!