I would also emphasize getting the floor flat before you start, because without it your going to have a tough time trying to get it to look like a single sheet of quartz.
thankyou "craigdon". been sweating me bits off getting two layers of vinyl and a base layer of vinyl tiles that were stuck like the preverbial shyte to a blanket :lol:. anyway , apart from there being the remains of a latex adhesive in certain areas ( will scrape off tomorrow .... the floor looks pretty level but will check with a 6foot level tomorrow and let you know.