Mapeker Rapid Set Flex - ok for novices?

Hi

I've seen these are 2 for £40 in Wickes right now and seem to tick all the boxes for what I need, my only concern is the rapid set.

Would I get away with mixing up a few tiles worth at a time or should I maybe go for Kera Flex Maxi? It's more expensive but there's a longer working time and you can bed it quite thick to even out dodgy surfaces.

Other than these, could anyone suggest something suitable for the bathroom, for walls and floors that have been boarded so flexible - preferably not with a 10 minute window.

Thanks

You have 20 mins, to use your mix up.
It is possible providing you prepare enough tiles to be laid, when comes to a number of cuts, do as many cuts as are required prior to mixing.
Good luck with you project.

What have the walls and floor been boarded with?