The reason why i bought Kerraflex is because of its extended open time, in other words it doesnt go off quickly (ideal for the DIY er). If you read the datasheet for keraquick it states that the mix must be used within 30 minutes, if you are not an experienced tiler i guarantee that half of your mix will go off in the bucket unless youre fast !! You can search the datasheets easily on google. It looks to me that kerraquick is the rapidset version of kerraflex. I did my homework last year before taking on my first bathroom and selected kerraflex for the above reasons.
Its strange really, i can walk into tile giant in rochdale and they've got bags of the stuff, what i did was trawl the internet for the cheapest price, print out the page, go in tile giant and they match it every time, in fact they told me that just over £** is the trade price so they gave me that, im actually going in next week and they said just bring your till receipt from last time and we will charge you the same. Maybe your side of the pennines just dont stock it.
As for the mapei ultracolour plus grout, screwfix sell it for a tenner (manhattan grey 5kg bag).
