I couldn't get to the Ilford link but from the URL it looks to be a process to convert b&w neg film to positive output. Is that right? Kodak has something similar as well. Called T-Max Professional Direct Positive kit or something like that. Looking at the data sheet for it it seems as though it's pretty forgiving in terms of times and temps. I haven't done it but in talking with someone who has, she indicates that it is absolutely unforgiving and virtually any variance messes up the results. If it matters, she worked at the only Scala capable lab in Canada till recently.

I've shot one roll of Scala (35mm). If it weren't so expensive I'd shoot more of it. It is a fabulous film. Deep inky blacks and stark whites. Great tonal range as well. It really is terrific stuff. The only limitation I find is the speed. At ISO 200 it's too fast to be of much use for long exposures in most cases, even with 3 or 4 stops worth of filters stacked on the front. But then I guess that's why they have Ilford Pan F.

The ilford docs seem pretty forgiving. Things like 5 minutes or until it's finished. Or other steps that seem to be fairly straight forward and flexible.

The advantage of something like this over Scala is you can use it with any film in any format.