I have one of those "roller" sharpeners, in theory a "good" one, it's from Global (the Japanese knife brand) not just an AliExpress knockoff.

It works reasonably well and is definitely quick. But its not even close to "95% as sharp) as when I spend 10 mins with my Lansky sharpening kit (which is really just a small set of graduated whetstones with a jig to keep the angle right while using it).

Would I recommend everybody spend $70 or so for a bottom end Lansky kit or similar? No. Not even close. But if cook a lot, and you're going to buy "nice" knives that you intend to keep for decades, and you notice and care about the difference between sharp and dull knives - then I'd suggest you at least consider it.