I have a love hate relationship with many things in life. One being my hardwood floors. (I hate carpet too though... I need to live in a hut with dirt floors. That I never need to clean and always look dirty because they are supposed too. That would be awesome... I'm being serious.)
First. The edges of the slats curve down leaving a great look. But who cares when it gets full of crumbs and crap that are a pain to get out? I literally have to get down on my hands and knees and scrub out the indents. I would never chose boards like this if I had the choice ever again... (and when your kids ride their hover boards, long boards, or hot wheels semi across them... thud, thud, thud... so irritating... and loud.)
Also, I have several children. Children are rough on hard wood floors. Okay they are rough on everything. But they are really rough on my hardwood. We end up with several gouges like the one seen below regularly...
So, I fix them. I can't replace them every time or anytime for that matter. To fix them I filled it with Elmer's Wood Putty in natural.