There is no contest in offering advice my friend. The guy is asking what he needs to do to make a good job, not what he 'could' do, then the overkill alarms ring loud with all the new products and methods pushed into a trade that really is not difficult, nor needs to be expensive. 70% of new products pushed into the tiling market over the last 15 years are absolutely pointless money spinners. Just because products exist is not reason enough to use them. The only quality products that have been introduced over the last 30 years are the quality of latex adhesives, which aren't required on concrete slabs, won't do any harm, but not required so why pay for them Anyway, we are 6of1 and half a dozen of t'other, so he should do well if he follows the advice offered. Mind you, I'll bet my hat he screws the setting out up, that is where the real skill comes in.