I used a pair of that only once, with good result. after that i bought the OKM Rock Studio's which are better (taped around 30 times). Only difference between those two is the amount of hiss. When recording with high levels and mic-in, the R-version can be hissy. I suggest you only buy them if you want to use the to stealth record loud(!) rock shows. Then you can make excellent recordings. For softer music i suggest Rock Studio's or different brands. Make sure the A3 adapter is there too, use it, but leave both setting off.
OKM's are very fragile, you need to be aware of that. Soundman.de is very nice. They fixed one broken mic for free!! Ask for Rolf, he's nice!