I love the look of Alcantara with Surface line. I can see how some people won't be a fan, just like most things.
I got the platinum because my previous type cover is the teal one which is similar to the cobalt blue. I hope the new version will be a bit easier to maintain and clean thanks to the extra coating, but I'm gonna follow the official website's cleaning routine to make sure I can keep it clean as long as possible. Just like others mentioned, all keyboards get dirty over time, my oldest one is the royal blue SP3 cover and it has gotten quite dirty in 2 years of use. This one is the lightest colour of all so I hope it will do well, so far I'm loving the look and feel of it