i have both kenco spa towels as well as premium micro fibre towel and their premium buffing micro fibre as well,
heres what i would say about each one use
the spa towels are really plush and great for giving a final wipe say after freshly waxing or for dusting with a spray wax or something that doest streak, however they are not good with wet surfaces or detailing sprays that require slight buffing, these leave streaks, and are of no use to remove waxes, they however can be used to removed light synthetic wax if you first use another towel and use this as a finishing touch
the luxury micro fibre towel is great and has good static charge plus its size makes it easy to dry car remove wax etc, the grey side is supposedly for use in interiors and yellow for exterior according to instructions but i found that grey side works better to remove hazing from any wax or cleaner etc while yellow side is good for normal use,
and the buffing towel is really nice and i especially love the 4 tuck in corners provided so that you can remove wax from those tricky spaces and it really makes removing wax/sealant etc so simple,if you have real thin layers then its a matter of just one wipe and you are done, however if thick layers than i find regular micro fibre towels to be quicker at removing the wax/sealant etc than this
hope this helps any future prospective buyer of kenco products:)
oh and i fi compare them to my meg supreme shine towel, i find the meguirs one easier to work with, it covers a bigger surface areas and is especially good when dealing with liquid stuff or drying, just one wipe while claying and the detailing spray would be cleaned while it can take two wipes from the premium micro fibre towel which also gets wet rather quickly though i find the quality of micorfibre of kenco way better