That's a bunch of horseshit.Fair question but as for the pro bit. That's like asking which one of these fast foods would you michelen star chefs serve in your restaurant?
So is that.I'm not knocking the product or those who use it, just it's association with the word 'pro'. That's because there is nothing in it's manual use that requires any professional skills over those of a complete first timer, there are even instructions in every bag.
You might as well argue that soldering is as easy for an amateur as for a professional, because there are instructions available on how to do it. Or that the fitting of a boiler is a doddle because the MIs are clear and all the documentation on gas work is readily available.
The point about what professionals do is that tricks-of-the-trade are developed and adopted in order to make the job quicker and/or the installation more reliable. For example, do you think that the Hep2o MIs tell you to check every grab wedge in case it's faulty?