The red is notably darker than advertised, think deep red rather than a the vibrant mid-red advertised. This was the case for KIT 1 (ESC/Return/Enter) and KIT 6 (arrows). This was disappointing given the high price for just a few key caps, but not worth paying for the shipping to return them. Quality otherwise seems fine.
The extra control keys ("660/Minila") never turned up with the order, I've since had a 2nd order for these and they didn't turn up either, I'm wondering if they even have these keycaps? I'll try one more time as I need these for the keyboard I'm building, then I might have to try and find a different seller.