Been using it for years and will carry on doing so

As you guys have said it dilutes down very well,great for engine bay cleaning, spot cleaning interior carpets,plastics etc.it's also good for running through your snow foam lance to de-wax your car if you are looking to strip it all back for a polish etc. I also use mine round the house for cleaning. A dash in a bucket makes a good pre soak solution for cleaning your microfibres out before you run them through the machine.
And yes very good value for money product.
Britemax interior cleaner is definatly 2nd on my list of cleaners, very strong product and takes no prisoners,dilutes down well and great for interior use.
Britemax grime out is another product I stock as its very effective on dirt,engine bays and door shuts etc, great degreaser also.
Both good alternatives if you can't get hold of G101.