Decware CSP2 +

How good is this as a preamp? How does it compare with much more expensive units? My most recent active tube linestages have been CAT SL1, Joule LA-150MKII SE, and Dodd. Does it compete in that league? If not, how so? The fact I can use it as a headphone amp is just icing on the cake. My current reference is the Lightspeed Attenuator, but I want an RCA-based tube linestage to throw in the mix. This is for a single source CD system.