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Here's what some of our users have to say...
If you have not registered yet you can do so here - registration is simple and only takes a few minutes.



"A great tool, thank you very much! Very shallow learning curve and then easy to use. Regards."


"First time I’ve used the online calculator, I’ve used your ACS software before. Very very useful and easy to use - also great that you’ve made it available free! [...] Nice work, very happy to use it."


"Hi, A brilliant tool and easy to use. Keep up the good work."


"What a fantastic tool, and your recommended automatic product selection is a great help!!!"
(regarding the Model Design Calculator specifically)


"Hello Knauf. Excellent piece of software. [ I have ] experimented for an hour or 2 and i can now use the software!! I like the compliance read out if the calc fails it can be manipulated and brought up to standard. Regards."