Rollei R3 as an IR film?

I was just looking through silverprints web site and read this about Rollei's R3 film:

"Sensitization goes up to about 710 to 730nm, which makes the material SUPER-APOCHROMATIC. Its sensitivity to infrared can be utilized photographically only if a black filter with a cut-of wavelength of 700 nm is employed."

So has anyone tried this?
How do the results compare to the current IR films on the market?

Peter