My verdict: powerful but too expensive for what it is.
Clay is well made, but it's too expensive. You can have much more flexibility and results by mixing Apify and n8n if you have a bit of technical background.
It remains a good solution for Growth teams that don't have a 'Tech' profile in-house and want power without coding. But the cost adds up quickly.
What I like less: the astronomical price. A serious campaign can cost hundreds of dollars in credits. For technical teams, it's economic nonsense.
My advice: if your team doesn't have a tech profile and time is worth more than money, Clay can make sense. Otherwise, look at n8n + Apify + BetterContact/Dropcontact - you'll have more flexibility for much less.