I have four of these types of knife blocks and I love them.
I want another four but at over $100 each I have to make haste slowly.
I use them because they don't dull my knife blades and I can colour code them so they are used for clean knives and dirty knives.
I have both Bodum and ScanPan sets.
The Green ones are for my clean knives and the red/Orange ones are for my dirty knives.
The finger like knife holders can be simply dropped out by tipping the blocks upside down and washing them either in the sink or dishwasher, which I do each evening when I do my dishes.
The clean knife block gets a daily hot water rinse but the dirty blocks get a through clean with hot soapy water and the block itself put put through the dishwasher along with the interior filling. Along with my cutting boards.
Try doing that with a wooden knife block, but I do use lemon juice and soapy water on my chopping boards.