Anyone has experience with CP21F ?

I have searched the forum and found that Infredible is using them in a modified L100, and found them "really sweet, close to the 2405 but a little more beamy".

They can be get new for 1/4 the price of a 2405 in France, but do they stand the comparison? Do they need a modified network when used in place of 2405 in a 4344 for example?